A pharmacy purchases 500 tablets for a wholesale cost of $140. Which of the following is the retail price for a 30-tablet prescription if the pharmacy applies a 2.5-times markup of the wholesale cost?

To determine the retail price for a 30-tablet prescription after applying a 2.5-times markup of the wholesale cost, it’s essential to first calculate the cost per tablet.

The wholesale cost of 500 tablets is $140. To find the cost per tablet, divide the total wholesale cost by the number of tablets:

Cost per tablet = $140 / 500 = $0.28

Next, to find the selling price for a single tablet after applying the 2.5-times markup, multiply the cost per tablet by the markup factor:

Selling price per tablet = $0.28 * 2.5 = $0.70

Now, since the prescription is for 30 tablets, we need to calculate the total retail price for those 30 tablets:

Total retail price for 30 tablets = $0.70 * 30 = $21

This calculation illustrates that the retail price for a 30-tablet prescription, after applying the specified markup to the wholesale cost, is indeed $21.