Design a controlled experiment to test the effect of water temperature on goldfish. Include hypothesis, independent variable, and dependent variable

$8,600

Explanation:

Implicit cost is also known as the opportunity cost which means that it is the benefit of the next best alternative that was foregone when the current decision was made.

The implicit cost here is therefore:

The $8,000 that Charles could have been making as a lifeguard.

The interest per year he could have been earning on the $5,000 he used to buy mowing equipment.

The depreciation on the mowing equipment because depreciation is not an explicit cost but an implicit one.

= 8,000 + (2% * 5,000) + (10% * 5,000)

= 8,000 + 100 + 500

= $8,600