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Jen and Barry's ice cream shop charges $1.5 for a cone. Variable expenses are $0.29 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 600 additional cones would be sold and that 800 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? Complete this question by entering your answers in the tabs below. Calculate the effect or unire promotion on operating income for the second week of Febry. Note: Do not round intermediate calculation and round your final answer to 2 decimal places. Complete this question by entering your answers in the tabs below. Do you think the promotion should occur