Directions: Click the Case Link above and use the information provided in Brook Plumbing Supply Company, Inc., Part B, to answer this question: What is the trend in Brook Plumbing's gross profit margin between 20Y1 and 20Y3 ? (Express your calculation as a percentage and carry to two decimal places it has increased each year. It has decreased each year. It increased in 20Y2, then decreased in 20Y3. Bookmark for review Part B Brook Plumbing Supply Company, inc Balance Sheets (in S000s) As At December 31