The following data is provided:

Planned volume for year (static budget) 4000 units
Standard direct materials cost per unit 3 lbs. @<hidden> $2.00 per pound
Standard direct labor cost per unit 2 hours @<hidden> $4.00 per hour
Total expected fixed overhead costs $18,000

Actual volume for the year (flexible budget) 4,200 units
Actual direct materials cost per unit 2.9 lbs. @<hidden> $2.10 per pound
Actual direct labor cost per unit 2.2 hrs @<hidden> $3.80 per hour
Total actual fixed overhead costs $17,600

1. Prepare a materials variance information table showing the standard price, actual price, standard quantity, and actual quantity.

My answer:

$2.00, $2.10, 12,600 lbs, and 12,180 lbs respectively.

2. Calculate the materials price and usage variances. Indicate whether the variances are favorable or unfavorable.

My answer:

$0.10 favorable (unsure of this answer)
$840.00 unfavorable

3. Prepare a labor variance information table showing the standard rate, actual rate, standard hours, and actual hours.

My answer:

$4.00, $3.80, 8,400, and 9,240 respectively.

4. Calculate the labor price and usage variances. Indicate whether the variances are favorable or unfavorable.

My answer:

$0.20 favorable (unsure of this answer)
I don’t know the usage variance.

5. Calculate the predetermined overhead rate, assuming that the company uses the number of units as the allocation base.

My answer:

I don’t understand how to calculate.

6. Calculate the overhead spending variance and the overhead volume variance. Indicate whether the variances are favorable or unfavorable.

My answer:

I don’t know how to calculate.

Thank you.