3 021 You are in charge of purchases at the student-run used book lsupply program at your colege, and you must decide how many introductory calculus, history, and marketing texts should be purchase d from students for resale. Due to budget imitations, you cannot purchase more than 900 of these textbooks each semester. There are also shelf-space limitations: Calculus texts occupy 2 units of sher space each hintory books 1 unit each, and marke·ing text. 4 units each, and you can spare ot most 600 u nits of sher space for the tenn. r the used ook program makes a proft of $10 on each calculus text, S4 on each hintory test and on each marketing text, how many of each type of text should you purchase to maximize profe? HINT (Ssee Example 3 caloulus texts) history text(o) marketing texts) What is the maximum proft the program can make in a semester? Need Help?o