Sheridan Productions Limited manufactures and sells three different products of different qualities. They are referred to as: Normal, High, and Superior. The accounting department provides the following information on these products:NormalHighSuperiorSelling price per unit$$30\mathrm{.}00$$$40\mathrm{.}00$$$51\mathrm{.}00$Variable costs per unit$$25\mathrm{.}50$$$34\mathrm{.}00$$$48\mathrm{.}00$Contribution margin per unit$$4\mathrm{.}50$$$6\mathrm{.}00$$$3\mathrm{.}00$Machine hours required$0\mathrm{.}020\mathrm{.}040\mathrm{.}08$Determine the contribution margin per machine hour. $($Round answers to $2$ decimal places, e$.$g$.15\mathrm{.}25.)$Contribution MarginNormal$per machine hourHighper machine hourSuperior$per machine hourIf the limited resource can be increased by $400$ hours, calculate the maximum increase in contribution margin.Assume that Sheridan can sell all products manufactured.