Help! Very confused, work in photo attached with all information included! What's blocked off is personal information that has nothing to do with the question. Thanks!

3. Suppose you are the owner of a blue jeans company. A market research firm has estimated that the own price elasticity of demand for your product is approximately -1.7. Your marketing department proposed four advertising campaigns, and estimates you company's sales and the advertising costs of each, shown in the table below. Advertising costs Sales $100,000 $5,000 $120,000 $10,000 $130,000 $15,000 $138,000 $20,000 $143,000 What level of advertising should your firm engage in? Why? Explain your