"for whitehair company, beginning inventory is $12,000 and ending inventory is $15,000. yearend account balances are: freight-in $1,100 purchases 50,000 purchase discounts 800 purchase returns and allowances 1,250 sales discounts 2,500 sales returns and allowances 3,600"whitehair's cost of goods purchased is $46,050. $49,050. $47,950. $51,100.

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