So there's this question to do with microeconomics where we have a particular store selling sandwiches at $3/unit with the following production costs:
I know that a business should produce sandwiches until the loss of continuing to operate is less than the loss caused by shutting down in the short run.
Here, the fixed cost is 20 so loss of shutting down would be 20. The answers say that this business should produce 4 sandwiches in the short run where there would be a loss of \$12-\$28=-\$16
But if the business produces 5 sandwiches, the loss would still be over -\$20, being \$15-\$33=-\$18.
Is there something I'm getting wrong with this question??