Answer:
I used an excel spreadsheet since there is not enough room here. I ordered the given data:
Fixed Variable Actual Total
Revenue $280 $39,250
Technician wages $8,400 $8,250
Mobile lab operating exp. $4,800 $31 $9,290
Office expenses $2,400 $3 $2,700
Advertising expenses $1,580 $1,650
Insurance $2,870 $2,870
Miscellaneous expenses $970 $1 $425
The actual results yielded an unfavorable operating income variance. Operating income = $14,065, unfavorable variance = $2,645