Cobb Company incurs costs of $28 per unit ($18 variable and $10 fixed) to make a product
that normally sells for $42. A foreign wholesaler offers to buy 5,000 units at $25 each.
Cobb will incur additional shipping costs of $1 per unit. Compute the increase or decrease
in net income Cobb will realize by accepting the special order, assuming Cobb has excess
operating capacity. Should Cobb Company accept the special order?