Kristen Rafferty, owner of Flower Mode, operates a local chain of floral shops. Each shop has its own delivery van. Instead of charging a flat delivery fee, Rafferty wants to set the delivery fee based on the distance driven to deliver the flowers. Rafforty wants to separate the fored and variable portions of the van's operating costs to got a better idea of how delivery distance affects these costs. Here are the data from the past seven months: View the data. Use the high-low method to determine Flower Mode's cost equation for van operating costs. Use your results to predict van operating costs at a volume of 15,500 miles. Let's begin by determining the formula that is used to calculate the variable cost (slope). Data