15. Waterway Industries has a materials price standard of $2.00 per pound. 4900 pounds of materials were purchased at $2.20 a pound. The actual quantity of materials used was 4900 pounds, although the standard quantity allowed for the output was 4300 pounds. Waterway Industries's total materials variance is

a. $2300 U.

b. $2300 F

c. $2180 U.

d. $2180 F.

19. Clark Company manufactures a product with a standard direct labor cost of two hours at $18 per hour. During July, 2400 units were produced using 5000 hours at $18.30 per hour. The labor quantity variance was

a. $3660 U.

b. $3600 U.

c. $2220 U

d. $3660 F.

20. Crane Company manufactures a product with a standard direct labor cost of two hours at $18 per hour. During July, 1500 units were produced using 3500 hours at $18.30 per hour. The labor price variance was

a. $10050 U.

b. $9000 U.

c. $10050 F.

d. $1050 U.

Please answer all 3 questions. Thank you!