Last month, you lent a work colleague $$5000$ to cover some overdue bills.

He agreed to pay you in $1$ month with interest at $2\%$ for the month, thus

owing you $$5100.$ Today, when the repayment is due, he asked you to

extend the loan for another month and he would pay you the $$5100$ next

month. In the meantime, you have had the offer to invest as much as you

wish in an oil$-$well venture that is expected to pay $35\mathrm{.}00\%$ per year and a

hot new IT stock that is estimated to return $33\mathrm{.}00\%$ the first year. If you let

your colleague have another month, what is the opportunity cost of your

decision? $($Note: Express your answer in dollar and percentage amounts.$)$

The opportunity cost is $

The opportunity cost in percentage is