Answer:
George buys 5 bags of cookies each month
Step-by-step explanation:
Given
(per gallon)

(per bag)
Required
Determine the number of bags of cookies he buys
First, we need to determine the marginal utility of cookies
To solve this, we make use of the following formula:

Substitute values for
MU of Milk = 4
Cost of Milk = 2
Cost of Cookies = 4
This gives:




From the given table:
The corresponding bags of cookies for marginal utility of 4 is 5
Hence:
George buys 5 bags