A linear programming computer package is needed. of important ingredients in each type of crude oil differs, as does the cost per gallon. The percentage of ingredients A and $B$ in each type of crude oil and the cost per gallon are shown.

$\backslash$table$[[$Crude Oil,Cost,Ingredient A$,$Ingredient B$],[1,$$$0\mathrm{.}30,20\%,60\%+$