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 36% per year and a hot new IT stock that is estimated to return 48% the first year. If you let your colleague have another month, what is the opportunity cost of your decision

There are at least 2 opportunity costs associated with of letting your colleague have another month:

You could invest in one of these options, or divide your money and invest in both options, e.g. invest $2,000 in the oil company and $3,000 in the IT company. Each different investment proportion results in a different opportunity cost.

Explanation:

Opportunity costs are the benefits lost or extra costs associated to carrying out an investment or activity instead of another alternative. Sometimes you might have several opportunity costs for one investment, e.g. invest in the IT company which is risky, invest in corporate bonds which is less risky or invest in US securities which is a safe investment.

you had 23.00$ because 28 - 5 = 23 then put it in dollar form