$10.$ Individual Problems $6-3$

An end$-$of$-$aisle price promotion changes the price elasticity of a good from $4$ to $5.$ Suppose the normal price is $$48,$ which equates marginal revenue with marginal cost at the initial elasticity of $4.$

What should the promotional price be when the elasticity changes to $5?($Hint: In other words, what price will equate marginal revenue and marginal cost?$)$

$$45\mathrm{.}00$

$$36\mathrm{.}00$

$$31\mathrm{.}50$

$$27\mathrm{.}00$