High-Low Cost Estimation Assume the local DHL delivery service hub has the following information available about fleet miles and operating costs: Year Miles Operating Costs 2006 553,000 2007 693,000 $177,000 205,000 Use the high-low method to develop a cost-estimating equation for total annual operating costs. (Let X = annual fleet miles.) Total annual costs= 97,600 X + 0.2 *X Check