1. The following cost formula for total purchasing cost in a factory was developed using monthly data.
Purchasing cost = $123,800 + ($15 × Number of purchase orders)
Next month, 2,000 purchase orders are predicted. The total cost predicted for the purchasing department next month
a. Is $2,000.
b. Is $153,800.
c. Is $30,000.
d. Is $123,800.
e. Cannot be determined from the above formula.

2. An advantage of the high-low method is that it
a. Is objective.
b. Is subjective.
c. Is the most accurate method.
d. Removes outliers.
e. Is descriptive of nonlinear data.

3. The following six months of data were collected on maintenance cost and the number of machine hours in a factory:

Select the independent and dependent variables.
Independent Variable Dependent Variable
a. Maintenance cost .....Machine hours
b. Machine hours ......Maintenance cost
c. Maintenance cost .....Month
d. Machine hours ......Month
e. Month ..........Maintenance cost

4. The following six months of data were collected on maintenance cost and the number of machine hours in a factory:

Select the correct set of high and low months.
High Low
a. January ......April
b. January ......March
c. June ........March
d. June .......April

5. An advantage of the scattergraph method is that it
a. Is objective.
b. Is easier to use than the high-low method.
c. Is the most accurate method.
d. Removes outliers.
e. Is descriptive of nonlinear data.

6. The cost formula for monthly supervisory cost in a factory
Total cost = $4,500
This cost
a. Is strictly variable.
b. Is strictly fixed.
c. Is a mixed cost.
d. Is a step cost.
e. Cannot be determined from this information.

7. (Appendix) In the method of least squares, the coefficient that tells the percentage of variation in the dependent variable that is explained by the independent variable is
a. The intercept term.
b. The x-coefficient.
c. The coefficient of correlation.
d. The coefficient of determination.
e. None of theabove.

Month January February March April May June Maintenance Cost ($) 16,900 13,900 10,900 11,450 13,050 16,990 Machine Hours 5,600 4,500 3,800 3,700 4,215 4,980 Month January February March April May June Maintenance Cost ($) 16,900 13,900 10,900 11,450 13,050 16,990 Machine Hours 5,600 4,500 3,800 3,700 4,215 4,980