The manufacturing costs of Calico Industries for three months of the year are as follows:

$\backslash$table$[[,$Total Cost,Production $($units$)],[$April$,$$$118,600,283,800],[$May$,85,600,168,700],[$June$,109,800,233,700]]$

Using the high$-$low method, the variable cost per unit and the total fixed costs, respectively, are

a$.$ $$0\mathrm{.}29$ per unit and $$36,298$

b$.$ $$5\mathrm{.}22$ per unit and $$3,630$

c$.$ $$0\mathrm{.}52$ per unit and $$18,149$

d$.$ $$2\mathrm{.}90$ per unit and $$3,630$