Jen and Barry's ice cream shop charges $$1\mathrm{.}5$ for a cone. Variable expenses are $$0\mathrm{.}32$ per cone, and fixed

costs total $$2,300$ per month. A Valentine's Day promotion is being planned for the second week of February.

During this week, a person buying a cone at the regular price would receive a free cone for a friend. It is

estimated that $775$ additional cones would be sold and that $975$ cones would be given away. Advertising

costs for the promotion would be $$140.$

Required:

a$.$ Calculate the effect of the promotion on operating income for the second week of February.

b$.$ Do you think the promotion should occur?