Requirement a. Evaluate the explanation provided by Sharma Show calculations to support your conclusions. First, compute the gross margin percentage for drug sales for 2021 through 2018; then, compute the gross margin percentage for nondrug sales for 2021 through 2018. (Round your answers to the nearest tenth percent, X.X%.) - Sales information Additional information 2021 2020 2019 2018 Industry Gross Sales (thousands) $ $ $ 11,462 $ Jones Drugs ($ in thousands) Profit Percent for 14,211 9,223 12,916 8,266 10,351 6,573 CGS (thousands) 7,313 Drug Cost of Nondrug Cost Retailers of Drugs Gross margin $ 4,988 $ 4,650 $ 4,149 $ 3,778 Drug Sales Nondrug Sales Goods Sold of Goods Sold and Related Products Percent 35.1 36.0 36.2 36.5 2021 $ 5,126 $ 9,085 $ 3,045 $ 6,178 32.7 2020 5,051 2,919 5,347 32.9 2019 7,865 6,641 5,732 2,791 4,821 4,619 33.0 4,522 3,908 2018 2,665 33.2 A discussion with Nandini Sharma, the controller, brings to light two possible explanations. She informs you that the industry gross profit percent in the retail drug industry declined fairly steadily for three years, which accounts for part of the decline. A second factor was the declining percent of the total volume resulting from the pharmacy part of the business. The pharmacy sales represent the most profitable portion of the business, yet the competition from discount drugstores prevents it from expanding as fast as the nondrug items such as magazines, candy, and many other items sold. Sharma feels strongly that these two factors are the cause of the decline. Print Done