Amin Corp. manufactured products

During December 2010, Amin Corp. manufactured products requiring 8,000 standard labor hours. The following variance and actual information is available:
Labor rate variance ……………………$4,500 U
Labor efficiency variance …………….12,000 U
Actual variable overhead …………….. 162,000
Actual fixed overhead ………………..84,000
Amin Corp.’s standard costs for labor and overhead were set at the beginning of 2010 and have remained constant through the year as follows:
Direct labor (4 hours A? $12 per hour) …………………………..$48
Factory overhead (10,000 DLHs expected capacity)
Variable (4 hours A? $16 per direct labor hour)……………. 64
Fixed (4 hours A? $9 per direct labor hour) ……………….. 36
Total unit conversion cost ……………………………………. $148
Calculate the following unknown amounts:
a. Number of units manufactured
b. Total applied factory overhead
c. Volume variance
d. Variable overhead spending variance
e. Variable overhead efficiency variance
f. Total actual overhead