Answer: $16.80
Step-by-step explanation:
The disinfecting wipes cost $12 for the store to buy one.
They then add a 40% mark up.
Find out what 40% of $12 is:
= 40% * 12
= $4.80
Add the markup to the cost to find the selling price:
= 12 + 4.80
= $16.80