Carnation's Roof Repair has provided the following information concering its budgeted costs:
- Wages and Salaries Fixed Cost per month : $21,380 Cost Per Repair Hour : $15.80
- Parts and Supploies Fixed Cost per month : 0 Cost Per Repair Hour : $7.50
- Equipment Depreciation : Fixed Cost per month $2,740 Cost per Repair Hour : $0.60
- Truck Operating Expenses : Fixed Cost Per month : $5,820 Cost per Repair Hour : $1,90
- Rent : Fixed Cost Per month : $4,650 Cost Per Repair Hour : $1.90
- Admin Expenses : Fixed Cost Per Month : $3,870 Cost Per Repair Hour : $0.70
Wages and salaries should be $21,380 plus $15.80 per repair hour. The company expected to work 2,500 repair hours in June but actually worked 2,400 repair hours. The company expects its sales to be $43.50 per repair hour. What is the activity variance for net operating income?