discount of $12\%,10\mathrm{.}5\%,9\%7\mathrm{.}5\%$ will be opened by great deal company on a line of product which is variable cost of $$48$ per unit fixed cost per unit at the current production level is $0\mathrm{.}4$ time of variable cost per unit great deal company wants to earn profit of $$20$ per unit with this discount sale what is the amount of price that should be listed to get the desired profit?