The manufacturing costs of Calico Industries for three months of the year are provided below: Total Cost Production (units) April $113,700 275,700 May 84,200 161,600 June 109,200 240,900 Using the high-low method, the variable cost per unit and the total fixed costs are a.$0.47 per unit and $21,009 b.$2.60 per unit and $4,202 c.$0.26 per unit and $42,018 d.$4.68 per unit and $4,202