Zitrik Corporation manufactured $90,000$ buckets during February. The variable overhead cost$-$allocation

base is $$5\mathrm{.}10$ per machine$-$hour. The following variable overhead data pertain to February:

Required:

d$)$ What is the actual variable overhead cost?

b$)$ What is the total flexible$-$budget amount?

c$)$ What is the variable overhead spending variance $($indicate whether favorable or unfavorable$)?$