Gadell Farms produces beef sausage that is distributed to grocery stores throughout the Southeast. They have collected this shipping cost data below. Using the high-low method, estimate the cost equation for Gadell Farms' packaging costs. (Hint: Packing cost is the dependent variable (y-axis)) a. y=1236+183x b. y=1236+0.0055x c. y=602+183x d. y=1300+500x