Cost Behavior SmokeCity, Inc., manufactures barbeque smokers. Based on past experience, SmokeCity has found that its total annual overhead costs can be represented by the following formula: Overhead cost = $591,840 + $1.33X, where X equals number of smokers. Last year, SmokeCity produced 21,600 smokers. Actual overhead costs for the year were as expected. Required: 1. What is the driver for the overhead activity? For questions 2-4, Enter the final answers rounded to the nearest dollar. 2. What is the total overhead cost incurred by SmokeCity last year? 3. What is the total fixed overhead cost incurred by SmokeCity last year? 4. What is the total variable overhead cost incurred by SmokeCity last year? For questions 5-7, round your answers to the nearest cent. Use those rounded figures in subsequent computations, if necessary. 5. What is the overhead cost per unit produced? 6. What is the fixed overhead cost per unit? 7. What is the variable overhead cost per unit? 8. Recalculate Requirements 5, 6, and 7 for the following levels of production: (a) 21,000 units and (b) 23,100 units. Round your answers to the nearest cent. 21,000 Units 23,100 Units The reason the unit costs changed in the way they did is because