A local Latin restaurant specializes in Peruvian, Cuban, and Tex-Mex cuisines in their recipes. Lomo Saltado, “Beef Stir-fry,” is considered a family meal. The restaurant uses the following function to determine the total cost for customers who choose to have the Lomo Saltado meals delivered, where x represents the number of Lomo Saltado meals purchased. C(x) = 12.09x + 5 What does 12.09 represent in terms of the cost?