Help please!
A farmer owns a 140 acre farm and plans to plant at most 3 crops. The seed for the crops A,B, and C cost $24, $45, and $30 per acre respectively. A maximum of $3960 can be spent on a seed. Crops A, B, and C require 1,2 and 2 workdays per acre, respectively and there are a maximum of 180 workdays available. If the farmer can make a profit of $140 per acre on a crop A, $200 per acre on crop B, and $160 per acre on crop C, how many acres of each crop should be planted to maximize profit?

Question