Advanced Micro Devices develops high$-$performing computing products. Assume one of its microprocessors has a standard labor time of $0\mathrm{.}25$ hour and a standard labor rate of $$20$ per hour. During February, the following activities pertaining to direct labor for the microprocessor were recorded:

Direct labor hours used$64,000$Direct labor cost$$1,248,000$Units of the microprocessor manufactured$250,000$

$($a$)$ Determine the labor rate variance.

$Answer $1$Answer $2$FU

$($b$)$ Determine the labor efficiency variance.

$Answer $3$Answer $4$FU

$($c$)$ Determine the total flexible budget labor cost variance.

$Answer $5$Answer $6$FU

Answer $4$UF

total materials variance

c$.$ How much of the total variance was related to the price paid to purchase the materials?

$Answer $5$

Answer $6$UF

$$

d$.$ How much of the difference between the answers to requirements $($a$)$ and $($b$)$ was related to the quantity of materials used? $($Hint: Compute materials quantity variance.$)$

$Answer $7$

Answer $8$UF