E$6-4($Algo$)$ Analyzing Changes in Price, Cost Structure, Degree of Operating Leverage $[$LO $6-4,6-5]$

Cove's Cakes is a local bakery. Price and cost information follows:

$\backslash$table$[[$Price per cake,$$13\mathrm{.}51$

Help me find the degree of operating leverage and the percentnet profit increase.