In anticipation of a major hurricane hitting the gulf coast, the quantity gasoline of sales rise from 360 million gallons to 375 million gallons. based on this information, what is the percent change in gasoline sales? specify your answer to one decimal place and use the midpoint formula.

The percent change in gasoline sales is 4.1%

Explanation:

The computation of the percentage change in gasoline sales by using the midpoint formula is shown below:

= (New sales of a gallon - old sales of a gallon) ÷ (New sales of gallon + old sales of a gallon) ÷ 2 × 100

= ($375 million - $360 million) ÷ ($375 million + $360 million) ÷ 2 × 100

= ($15 million ÷ $367.50 million) × 100

= $4.1%

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.