Respuesta :

Answer: 20 ounces of cereal for $3.99 costs more per ounce.

The cereal that costs more per ounce is the cereal that is being sold at $3.09 for 13.5 ounces.

Cost per ounce of First cereal

= Cost / Number of ounces

= 3.09 / 13.5

= $0.23 per ounce

Cost of Second Cereal

= Cost / Number of ounces

= 3.99 / 20

= $0.20 per ounce

In conclusion, the first cereal costs more.

Find out more on costs per unit at https://brainly.com/question/609464.