Question 1075189
2700+600x<1500x is the profit function
or 1500x>2700+600x
900x>2700
x>3
He needs to sell at least 4 computers a week to make a profit, which will be $6000 of revenue minus $2700 in fixed costs minus $2400 costs of building 4 computers.

Note: 3 computers is break even, not a profit.