4) Suppose that GuS is considering a price promotion for its new mixers during the 2023 \"holiday season,\" extending roughly from Thanksgiving to New Year's Day. At present, GuS sells a four-pack of mixers to wholesalers for a regular price of $4.40. At that price GuS earns a 38% gross margin on selling price. GuS would like reduce the retail price that consumers pay for a fourpack by $1 during the price promotion. GuS's plan is to reduce the price it charges wholesalers by $1, ask the wholesalers to also reduce their price to retailers, which is presently $5.50, by $1, and also ask retailers to reduce the price to consumers, which is presently $8, by $1. In other words, GuS is hoping that the Wholesaler and retailer will reduce their prices, in monetary terms, by the same amount that GuS reduces their prices. This action is known as 100% promotional passthrough, a term we will discuss later in the semester. a) What is GuS's (i) gross margin in dollars, for a fourpack and (ii) gross margin on selling price, for a four-pack, if it decides to adopt this holiday season price promotion? (10 pts.) b) Suppose that GuS usually sells 100,000 four-packs of mixers during the holiday season, at regular prices. How many four-packs must it sell to make the same amount of gross margin, in dollars, during the holiday season if it uses this holiday price promotion? (12 pts.)