The manufacturing costs of Calico Industries for three months of the year are provided below: Total Cost Production (units) April $121,200 283,700 May 84,600 166,300 June 107,000 249,100 Using the high-low method, the variable cost per unit and the total fixed costs are

a.$0.56 per unit and $16,627

b.$0.31 per unit and $33,253

c.$3.10 per unit and $3,325

d.$5.58 per unit and $3,325