Blue Company accumulates the following data concerning raw materials in making one gallon of finished product. $(1)$ Price$-$net purchase price $$2\mathrm{.}50,$ freight$-$in $$0\mathrm{.}30,$ and receiving and handling $$0\mathrm{.}30.(2)$ Quantity$-$required materials $3\mathrm{.}40$ pounds, allowance for waste and spoilage $0\mathrm{.}70$ pounds.

Compute the following. $($Round answers to $2$ decimal places, e$.$g$.1\mathrm{.}25.)$

$($a$)$ Standard direct materials price per gallon.

$ $$

$($b$)$ Standard direct materials quantity per gallon. $$ pounds

$($c$)$ Total standard materials cost per gallon. $$