The manufacturing costs of Kellam Industries for the first three months of the year follow: Total Costs Units Produced January $218,880 2,090 units February 290,870 3,590 March 340,480 5,890 Using the high-low method, determine (a) the variable cost per unit and (b) the total fixed cost. a. Variable cost per unit $ fill in the blank 1 b. Total fixed cost $ fill in the blank 2