2018 2019 2020 Item Quantity Price Quantity Price Quantity Price Hamburgers 2,000 $3.00 5,000 $4.00 3,000 $5.00 Hot Dogs 2,000 $2.00 2,500 $4.00 5,000 $5.00 Buns 4,000 $1.50 7,000 $2.00 7,500 $2.50 Ketchup 100 $0.50 200 $0.75 500 $1.00 Mustard 200 $0.75 400 $1.00 1000 $1.25 Using 2018 as the base year, compute the following