A company discovers that to produce z = 950 new electronic parts, it will cost y = $78,800. To produce 760 new electronic parts, it will cost $64,360. Compute the slope of the costs and choose the most accurate statement from the following: O Costs are decreasing at a rate of $79 per item. O Costs are increasing at a rate of $81 per item. O Costs are increasing at a rate of $79 per item. O Costs are decreasing at a rate of $76 per item. O Costs are decreasing at a rate of $81 per item. O Costs are increasing at a rate of $76 per item