Damon Industries manufactures 20,000 components per year. The manufacturing cost of the components was determined as follows:

Direct materials $100,000
Direct labor 160,000
Variable manufacturing overhead 60,000
Fixed manufacturing overhead 80,000

An outside supplier has offered to sell the component for $17. If Damon purchases the component from the outside supplier, the manufacturing facilities would be unused and could be rented out for $10,000. If Damon purchases the component from the supplier instead of manufacturing it, the effect on income would be:

a. a $30,000 increase.
b. a $50,000 decrease.
c. a $70,000 increase.
d. a $10,000 decrease.