A t-shirt maker would be willing to supply 75 t-shirts per day at a price of $18.00 each. At a price of $20.00, the t-shirt maker would be willing to supply 100 t-shirts. Using the midpoint method, the price elasticity of supply for t-shirts is about a. 0.37, and supply is elastic. b. 0.37, and supply is inelastic. c. 2.71, and supply is elastic. d. 2.71, and supply is inelastic.