1: Wafflio sells waffle shoes in Jakarta and can sell them 120 pairs in February 2021 meanwhile their planning only 100 pairs with the selling price $150. They have their own formula for their revenue and expense calculation: a. Wage and salaries: $2,000 + $ 5q b. Material: $10q c. Office rent: $1,500 d. Supplies: $800 e. Insurance: $200 f. Depreciation on equipment: $500 The actual: Units 120 Sales $17,500 Expenses Wage and salaries $2,700 Material $800 Office rent $1,500 supplies $1,000 Insurance $300 Depreciation on equipment $500 Required: Prepare the activity variance and also revenue and spending variance and explain each favorable and unfavorable meaning that occurs