Lagerfeld Company reported the following results from the sale of 5,000 hammers in May: sales $200,000, variable costs $120,000, fixed costs $60,000, and net income $20,000. Assume that Lagerfeld increases the selling price of hammers by 10% on June 1. How many hammers will have to be sold in June to maintain the same level of net income?
a. 4,000.
b. 4,300.
c. 4,500.
d. 5,000.