The average price of a gallon of gas in $2018$ increased $$0\mathrm{.}30(12\mathrm{.}4$ percent$)$ from $$2\mathrm{.}42$ in $2017$ to $$2\mathrm{.}72$ in $2018.$ Let's see whether these changes are reflected in the income statement of Daisy Petrolum Industries for the year ended December $31,2018($amounts in billions$).$

$\backslash$table$[[$Revenues$,2018,2017],[$Costs of purchaced caud,$ $236,$$$20$