Meg is in-charge of the "Call-Me" call center. She has data for the average time it takes the operators to answer a phone call, and would like to use control charts to analyze the data. Which of the following statements are true? 1. She should use variable control charts.
2. She should use attribute control charts.
3. If she plots this data in the right control charts, and observes that all points are within the control limits and there are no visible patterns in the data.

Then, she can conclude that the process is meeting the specifications set by Call-Me, in terms of the average time taken to answer a call, 99.7% of the time.

a. 1 and 3 only
b. None of the statements are true
c. 1 and 2 only
d. All the statements are true
e. 2 and 3 only
f. 1 only

Milden company has an exclusive franchise to purchase a product from the manufacturer and distribute it on the retail level. as an aid in planning, the company has decided to start using a contribution format income statement. to have data to prepare such a statement, the company has analyzed its expenses and has developed the following cost formulas: cost cost formula cost of good sold $35 per unit sold advertising expense $210,000 per quarter sales commissions 6% of sales shipping expense ? administrative salaries $145,000 per quarter insurance expense $9,000 per quarter depreciation expense $76,000 per quarter management has concluded that shipping expense is a mixed cost, containing both variable and fixed cost elements. units sold and the related shipping expense over the last eight quarters follow: quarter units sold shipping expense year 1: first 10,000 $ 119,000 second 16,000 $ 175,000 third 18,000 $ 190,000 fourth 15,000 $ 164,000 year 2: first 11,000 $ 130,000 second 17,000 $ 185,000 third 20,000 $ 210,000 fourth 13,000 $ 147,000 milden company’s president would like a cost formula derived for shipping expense so that a budgeted contribution format income statement can be prepared for the next quarter. required: 1. using the high-low method, estimate a cost formula for shipping expe