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 1,300 $229,320 2,390 322,320 356,720 3,900 a. Determine the variable cost per unit and the total fixed cost. Variable cost: (Round to the nearest dollar.) $ per unit Total fixed cost $ b. Based on part (a), estimate the total cost for 1,870 units of production Total cost for 1,870 units