$ 1.42 per muffin
Explanation
Step 1
Let
total earning:$ 20 per day
average muffins per day:14 muffins
so, to find the earn per muffin, we need to divide the enarning by the number of muffins, so
[tex]\text{charge per muffin=}\frac{\text{ \$ 20}}{14\text{ muffins}}=1.42\text{ \$ }[/tex]therefore, the answer is
$ 1.42 per muffin
I hope this helps you