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

$\backslash$table$[[,$Total Cost,Production $($units$)],[$April$,$$$119,000,277,700],[$May$,89,200,160,800],[$June$,106,800,233,100]]$

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

a$.$ $$2\mathrm{.}50$ per unit and $$4,958$

b$.$ $$0\mathrm{.}25$ per unit and $$49,575$

c$.$ $$4\mathrm{.}50$ per unit and $$4,958$

d$.$ $$0\mathrm{.}45$ per unit and $$24,788$