21. The following table shows the supply schedule of bread for three sellers in the economy. Assume that these three sellers constitute the entire market. Price Seller 1 Seller 2 Seller 3 (S per Quantity Supplied Quantity Supplied Quantity loaf) (loaves) (loaves) Supplied (loaves) $4 15 40 $3 12 15 $2 6 9 24 $1 2 6 11 Refer to the table above. If the market supply of bread at a price of $3 per loaf is 45 loaves, Seller 3's supply is loaves. 15 24 18 20 9.0!\