Please help with question 2, I'm torn between 2 answers.

Practicum #2 Name: INSTRUCTIONS: ALL FORMULAE AND CALCULATIONS MUST BE SHOWN. 1. Calculate each of the following: a. Markup dollars, $90.00. These markup dollars are 25% of the retail price on the product. What is the product's cost and the Markup @ Retail ? b. Merchandise Cost, $12.00; Markup @ Retail, 40.0%. What is Markup @ Cost? fora 2. You have just completed a year-long test market for a product to be commercialized. A strategic adjustment was made during the test Initial Six Months Last Six Months Price Units Sold Price Units Sold $40.00 20,000 $50.00 18,000 Given these data, the best use of these data would be to: a. Calculate Market Share b. Calculate Financial Payback d. Calculate Return on Investment c. Calculate Gross Margin e. Calculate Price Elasticity In the space below, show the formula and calculation you would use to justify your answer to 2a above