I am having a hard time figuring this out

The table and graph below describe the supply of umbrellas per month in Peoria. Supply of Umbrellas Price Quantity of Umbrellas (dollars) Supplied $120 5,090 100 4,006 80 3,090 60 2,000 40 1, 090 20 Supply of Umbrellas 140 120 100 80 Price (dollars) 60 40 20 1000 2000 3000 4000 5000 6000 Quantity (umbrellas) Instructions: Round your answers to two decimal places. a. Using the midpoint method, the price of umbrellas increases from $40 per umbrella to $60 per umb Price increases by