You own an ice-cream stall at Sandy Beach.You can sell each ice-cream for $2.With extra opening hours for your stall you believe that you can increase your sales as shown in the table below.For each hour the stall is open the opportunity cost of your time is $15.For how many hours should you open your stall?

You own an ice-cream stall at Sandy Beach. You can sell each ice- cream for $2. With extra opening hours for your stall you believe that you can increase your sales as shown in the table below. For each hour the stall is open the opportunity cost of your time is $15. For how many hours should you open your stall? Hours of Total sales of opening ice-creams 0 0 1 30 2 50 3 65 4 75