Answer:
The 40 oz cat food costing $8.00 is the lowest cost.
Step-by-step explanation:
Here, to compare the price of the cat food we need to find the UNIT RATE of the cat food of each size bag.
<u>24 oz bag cost $5.49.</u>
⇒ Cost of 1 oz cat food =
or, the cost of 1 oz of cat food here is $0.22875.
<u>40 oz bag cost $8.00.</u>
⇒ Cost of 1 oz cat food =
or, the cost of 1 oz of cat food here is $0.20.
<u>64 oz bag cost $15.99.</u>
⇒ Cost of 1 oz cat food =
or, the cost of 1 oz of cat food here is $0.2498.
Now, comparing the cost of 1 oz of cat food we seen that the lowest price of cat food per oz is $0.20 in the 40 oz pack.
Hence, the 40 oz cat food costing $8.00 costs the least.