Kelly has decided to start his own business giving sailing lessons. To purchase equipment for the business, Kelly withdrew $1,000 from his savings account, which was earning 3% interest, and borrowed an additional $2,000 from the bank at an interest rate of 7%. What is Kelly's annual opportunity cost (implicit plus explicit costs) of the financial capital that has been invested in the business?
A) $170
B) $140
C) $30
D) $300
Since Kelly withdrew $1000, he lost the potential $30 he could've earned in interest. Also, when he borrowed $2000, the interest rate of 7% was $140. So, the implicit+explicit cost is 140 + 30 = $170.
