Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions:
-(Table: Variable Costs for Lawns) Look at the table Variable Costs for Lawns. During the summer, Alex runs a lawn-mowing service, and lawn-mowing is a perfectly competitive industry. Assume that costs are constant in each interval; that is, the variable cost of mowing 1 through 10 lawns is $100. His only fixed cost is $1,000 for the mower. His variable costs include fuel, his time, and mower parts. Which of the following is a point on Alex's short-run supply curve?

A) P = $5; Q = 10.
B) P = $10; Q = 100.
C) P = $60; Q = 40.
D) P = $20; Q = 300.