$2-$c$.$ Which of the following$($s$)$ is true? $($Select all that apply.$)$

The gross profit percentage is the average amount of gross profit earned on each dollar of net purchase.

The gross profit is cost of goods sold minus net sales revenue.

The gross profit is net sales revenue minus cost of goods sold.

The gross profit percentage is the average amount of gross profit earned on each dollar of net sales.

Did the gross profit percentage in the current year improve, or decline, relative to the $39$ percent gross profit percentage in the prior

year?