Travis Metals heats copper ingots to a high temperature by placing them in a large oven. The heated ingots are then run through a shaping machine that forms them into wire. Due to the length of time it takes the oven to heat up, it is never turned off. When the ingots are placed in the oven the temperature is raised to a higher level. Once they are done being heated the oven temperature is turned back down until a new batch of ingots is ready to be heated. The following information shows the ingots processed and the power costs over the past 10 months. Month January Ingots Power Cost 146 $6,940 February 126 $5,940 March 116 $5,840 April 136 $6,440 May 166 $7,440 June 156 $7,040 July 106 $5,440 August 96 $4,640 September October 86 $4,840 76 $3,840 Required: 2. Using the high-low method, estimate a cost formula for power costs. Express the formula in the form Y=a+bX 3. Predict total power costs in a month when 176 ingots are processed. Total power costs