20 pts Estimated shipping cost at Junk Food Imports is estimated using the high-low method. Past records indicate total shipping cost was $18,000 for 16,000 pounds shipped and $22,500 for 22,000 pounds shipped. Using the high-low method, what is the company's estimated cost function? OY $4,500+ $1.13(x) OY 1.13+ $4,500(x) None of the answers are correct. OY $6,000+ $0.75(x) OY $0.75+ $6,000(x)