Suppose that in year 1 daily sales at dave's deli daily totaled $1,000, and daily sales at bertha's burgers totaled $1,500. in year 2, dave's daily sales increased to $1,300, and bertha's daily sales increased to $1,800. the percentage change in sales for dave was

30%

Explanation:

Given that,

In year 1:

Dave's Deli sales = $1,000

Bertha's Burgers sales = $1,500

In year 2:

Dave's Deli sales = $1,300

Bertha's Burgers sales = $1,800

Therefore,

percentage change in sales for Dave:

= [(Change in sales) ÷ sales in year 1] × 100

= [($1,300 - $1,000) ÷ $1,000] × 100

= ($300  ÷ $1,000) × 100

= 0.3 × 100

= 30%

Therefore, the Dave's sales increases by 30%.

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.