Company A manufactures a vegetarian chew biscuit for puppies. The dog biscuit uses a multigrain formula that sometimes varies depending on supplier cost and availability. The company produces a standard lot of 50,000 kilograms of biscuits. The standard for each batch is as follows:

Cost per kg kgs used

Whole wheat $1.20 30,000

Quinoa $2.50 15,000

Spelt $3.50 5,000

In May, Company A produced 50,000 kilograms of biscuits. The actual use of grain for the month was as follows:

Kg usedCost per kg

Whole wheat 27,500 $1.25

Quinoa 16,000 $2.40

Spelt 6,500 $3.25

In June, Company A produced a 51,500 kg batch of biscuits. The actual use of grain for the month was as follows: (Actual costs in June were back to standard)

Whole wheat 31,000

Quinoa 16,000

Spelt 5,000

Required

a) What is the total mix variance for May and for June?

b) What is the total yield variance for May and for June?