please include steps! having trouble calculating!

High-Low Method Ziegler Inc. has decided to use the high-low method to estimate the total cost and the fixed and variable cost components of the total cost. The data for various levels of production are as follows: Units Produced Total Costs 1,980 $278,640 3,330 313,320 5,580 433,440 a. Determine the variable cost per unit and the total fixed cost. Variable cost: (Round to the nearest per unit e nearest dollar) Total fixed cost: b. Based on part (a), estimate the total cost for 2,720 units of production. Total cost for 2,720 units