Assume that three identical units of merchandise are purchased during October, as follows: Units Cost October 5 Purchase 1 $ 5 12 Purchase 1 7 28 Purchase 1 9 Total 3 $21 Assume one unit is sold on October 31 for $15. Determine Cost of Merchandise Sold, Gross profit, and Ending Inventory under the FIFO method.

Sales at a fast-food restaurant average $6,000 per day. the restaurant decided to introduce an advertising campaign to increase daily sales. to determine the effectiveness of the advertising campaign, a sample of 49 days of sales were taken. they found that the average daily sales were $6,300 per day. from past history, the restaurant knew that its population standard deviation is about $1,000. if the level of significance is 0.01, have sales increased as a result of the advertising campaign? multiple choicea)fail to reject the null hypothesis.b)reject the null hypothesis and conclude the mean is higher than $6,000 per day.c)reject the null hypothesis and conclude the mean is lower than $6,000 per day.d)reject the null hypothesis and conclude that the mean is equal to $6,000 per day.expert answer