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ACCTG 102 Lecture Notes - Lecture 4: Cost Driver, Fixed Cost, Variable Cost

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ochrehornet578
18 Jun 2020
School
GCC
Department
Accounting
Course
ACCTG 102
Professor
Gentile

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Document Summary

Cost behaviour: is the general term to describe whether a cost changes when the level of activity changes. Fixed cost: is a cost that does not change in total as activity changes. Variable cost: increase in total with an increase in activity and decreases in total with a decrease in activity. A cost driver is a key determinant of cost behaviour. A cost driver is causal measurement that causes costs to change. A cost is fixed or variable with respect to some output measure or cost driver. First we ask ourselves, what causes the cost of this activity to go up or down? . The relevant range is the range of output over which an assumed cost relationship is valid for the normal operations of a firm. The relevant range limits the cost relationship to the range of operations that the firm normally expects to occur. Avoids extremely high levels of activity or low levels of activity.

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Related Questions

Why is it important to identify the most appropriate costdrivers for a particular product?

A) so managers can identify the activities necessary tomanufacture a product

B) so managers can control product costs better

C) so managers can predict product costs better and make betterdecisions

D) B and C

Answer:

Cost drivers are ________.

A) the different functions in the value chain

B) different types of functional areas in the firm

C) measures of activities that require the use of resources andthereby cause costs

D) different types of cost calculations

Answer:

Within the relevant range, the total amount of ________ costchanges in direct proportion to changes in the cost driver. Withinthe relevant range, the total amount of ________ cost does notchange in direct proportion to changes in the cost driver.

A) fixed; variable

B) variable; fixed

C) step; mixed

D) mixed; step

Answer:

What happens when the cost-driver level increases within therelevant range?

A) Total fixed costs remain unchanged.

B) Fixed costs per unit of cost driver increase.

C) Total variable costs decrease.

D) Variable costs per unit of cost driver increase.

Answer:

Which of the following costs is a fixed cost?

A) cost of dairy ingredients used to produce ice cream

B) depreciation expense on factory building

C) fuel used by delivery trucks

D) labor wages of workers who mix dairy ingredients to make icecream

1. Which one of the following refers to a cost that remains the same as the volume of activity decreases within the relevant range?

A. Average cost per unit.

B. Variable cost per unit.

C. Unit fixed cost.

D. Total variable cost.

2. The relevant range refers to the activity levels over which

A. Cost relationships hold constant.

B. Costs fluctuate.

C. Production varies.

D. Relevant costs are incurred.

3. When identifying fixed and variable costs, which one of the following is a typical assumption concerning cost behavior?

A. General and administrative costs are assumed to be variable costs.

B. Cost behavior is assumed to be realistic for all levels of activity from zero to maximum capacity.

C. Total costs are assumed to be linear when plotted on a graph.

D. The relevant time period is assumed to be 5 years.

4. A management accountant is about to prepare graphs of total variable cost and per-unit variable cost for use in a short-term planning model. Dollars will be depicted on the vertical axis; activity will be shown on the horizontal axis. How will these graphs appear under completion?

Total Variable Cost; Per-Unit Variable Cost

A. Straight line, sloping upward to the right; Straight line, parallel to the horizontal axis

B. Curvilinear, sloping upward to the right; A line that basically parallels the horizontal axis, first decreasing and then increasing

C. Straight line, sloping upward to the right; Straight line, sloping upward to the right

D. Straight line, parallel to the horizontal axis; Straight line, sloping upward to the right

5. A company has found that its total electricity cost has both a fixed component and a variable component within the relevant range. The variable component seems to vary directly with the number of units produced. Which one of the following statements concerning electricity cost is incorrect?

A. The total electricity cost will increase as production volume increases.

B. The total electricity cost per unit of production will increase as production volume increases.

C. The variable electricity cost per unit of production will remain constant as production volume increases.

D. The fixed electricity cost per unit of production will decline as production volume increases.

Question : Cost behaviour; committed and discretionary costs; high–low method: mining company

Outback Mining Ltd (OML), which mines ore in Australia's north-west, uses a calendar year for financial reporting purposes. The following selected costs were incurred in December, the low point of activity, when 1400 tonnes of ore were extracted.

Straight-line depreciation $30 000

Charitable contributions* 12 000

Mining labour (including oncosts) 315 000

Royalties 140 000

Trucking and hauling 280 000

Peak activity of 2700 tonnes occurred in June, resulting in mining labour costs (including oncosts) of $607 500, royalties of $224 500, and trucking and haulage costs of $360 000. The trucking and hauling costs exhibit the following behaviour:

Less than 1 500 tonnes $240 000

From 1 500–1 899 tonnes 280 000

From 1 900–2 299 tonnes 320 000

From 2 300–2 699 tonnes 360 000

OML uses the high–low method for analysing cost behaviour.

Required:

1 Assuming that royalties are a semi variable cost, classify each of the other four costs listed above in terms of their behavior as variable, step-variable, committed fixed, discretionary fixed, step-fixed, or semi-variable. Show calculations to support your answers for mining labour costs.

2 Calculate the total cost for next February when 1650 tonnes of ore are expected to be extracted.

3 Comment on the cost effectiveness of hauling 1500 tonnes with respect to OML's trucking/hauling cost. Can the company's cost effectiveness be improved? How?

4 Distinguish between committed and discretionary fixed costs. If OML were to experience severe