Tom owns a Pizza Restaurant. Expenses for the restaurant include raw material for pizza at $$9\mathrm{.}90$ per slice, $$193\mathrm{.}00$ as monthly rental and $$53\mathrm{.}00$ monthly as insurance. A restaurant sells pizza at a rate of $$\frac{14\mathrm{.}90}{?}$ slice. How many slices should the restaurant sell in a month to break even?