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 $2018.$

Required:

Conduct a horizontal analysis by calculating the year$-$over$-$year changes in each line item, expressed in dollars and in percentages for the income statement of Bronze, Incorporated for the year ended December $31,2018($amounts in billions$).$

$2-a.$ Conduct a vertical analysis by expressing each line as a percentage of total revenues

$2-$b$.$ Excluding income tax and other operating costs, did Bronze earn more gross profit per dollar of revenue in $2018$ compared to $2017?$

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Req $1$

Req $2$A

Conduct a horizontal analysis by calculating the year$-$over$-$year changes in each line item, expressed in dollars and in percentages for the income statement of Bronze, Incorporated for the year ended December $31,2018($amounts in billions$).($Decreases should be indicated by a minus sign. Enter your answers in billions $($i$.$e$.,10,000,000,000$ should be

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$\backslash$table$[[$BRONZE$,$ INCORPORATED$],[$Income Statements$],[($amounts in billions$)],[$For the Year Ended December $31],[\backslash$table$[[$Revenues$]],2018,2017,$Change in$],[$Dollars$,$Percentage,$],[$$$,306,$$$,260,,,\%$