a local science museum normally sells tickets to its museum for $5 each. the daily maximum capacity of the museum is 1,000 visitors. fixed costs are $2,000 and variable costs are $1.50 per visitor. a local school group has approached the museum wishing to purchase 50 special passes at a cost of $2.50 each. assuming the museum has excess capacity if the special order were accepted, what is the change in net income?