Walker Consulting helped McCall Roofers put various cost saving techniques into place. The contract specifies that Walker will receive a flat fee of $70,000 and an additional $19,000 if McCall attains a target amount of cost savings. Walker estimates a 20% chance that McCall will reach the target for cost savings. Assuming that Walker uses the expected-value approach, what is the transaction price for this product?

a. $19,000

b. $70,000

c. $73,800

d. $89,000