Fast Turnstiles Co. is evaluating the extension of credit to a new group of customers. Although these customers will provide $540,000 in additional credit sales, 15 percent are likely to be uncollectible. The company will also incur $18,100 in additional collection expense. Production and marketing costs represent 72 percent of sales. The firm is in a 30 percent tax bracket and has a receivables turnover of five times. No other asset buildup will be required to service the new customers. The firm has a 12 percent desired return. a-1. Calculate the incremental income after taxes.

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