Answer:
A) Mrs. Simpson should buy more milk and less bread.
B) Mrs. Simpson is not buying the utility-maximizing combination of bread and milk since the marginal utility per cent spent on bread is 0.80 and the marginal utility per cent spent on milk is 0.875.
Step-by-step explanation:
Besides the nutritional differences between bread and milk, Mrs. Simpson is not buying the utility-maximizing combination of bread and milk.
When she purchases bread, she is paying $1 for 80 utils, that means that the marginal utility per cent spent is 0.80.
When she purchases milk, she is paying $0.80 for 70 utils, that means that the marginal utility per cent spent is 0.875.
So the marginal utility per cent spent is higher for milk.