Jen and Barry$$s ice cream shop charges $$1\mathrm{.}6$ for a cone. Variable expenses are $$0\mathrm{.}35$ per cone, and fixed costs total $$2,100$ per month. A Valentine$$s Day promotion is being planned for the second week of February. During this week, a person buying a cone at the regular price would receive a free cone for a friend. It is estimated that $700$ additional cones would be sold and that $900$ cones would be given away. Advertising costs for the promotion would be $$135.$

Required:

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

Do you think the promotion should occur?