Cully Turniture Buys Two Products for Resale: Big Shelves (B)

Cully Turniture buys two products for resale: big shelves (B) and medium shelves (M) . Each big shelf costs $500 and requires 100 cubic feet of storage space, and each medium shelf costs $300 and requires 90 cubic feet of storage space. The company has $75,000 to invest in shelves this week, and the warehouse has 18,000 cubic feet available for storage. Profit for each big shelf is $300 and for each medium shelf is $150. What is the storage space constraint?

A) 90 B + 100 M ≥ 18000
B) 90 B + 100 M ≤ 18000
C) 100 B + 90 M ≤ 18000
D) 500 B + 300 M ≤ 18000