$10.$ Individual Problems $6-3$

An end$-$of$-$aisle price promotion changes the price elasticity of a good from $3$ to $4.$ Suppose the normal price is $$36,$ which equates marginal revenue with marginal cost at the initial elasticity of $3.$

What should the promotional price be when the elasticity changes to $4?($Hint: In other words, what price will equate marginal revenue and marginal cost?$)$

$$32\mathrm{.}00$

$$41\mathrm{.}60$

$$25\mathrm{.}60$

$$19\mathrm{.}20$