Todrick Company is a merchandiser that reported the following information based on $1,000$ units sold:$$Sales$ $435,000$Beginning merchandise inventory$ $29,000$Purchases$ $290,000$Ending merchandise inventory$ $14,500$Fixed selling expense?Fixed administrative expense$ $17,400$Variable selling expense$ $21,750$Variable administrative expense?Contribution margin$ $87,000$Net operating income$ $26,100$Required:$1.$ Prepare a contribution format income statement$\mathrm{.}2.$ Prepare a traditional format income statement$\mathrm{.}3.$ Calculate the selling price per unit$\mathrm{.}4.$ Calculate the variable cost per unit$\mathrm{.}5.$ Calculate the contribution margin per unit$\mathrm{.}6.$ Which income statement format $($traditional format or contribution format$)$ would be more useful to managers in estimating how net operating income will change in responses to changes in unit sales?