can i get help with #5

and also 7

and also these 2 the rest of the question im ok

BlueDenim Company makes blue jeans. Last week, Direct Materials (DM) costing $48,000 were put into production. Direct labor (DL) of $30,000 was incurred. Overhead (O/H) equaled $72,000. By the end of the week, Blue Denim had manufactured 30,000 pairs of jeans. 1. The prime cost for BlueDenim last week was: A. $68,000 B. $150,000 C. $78,000 D. None of the Above Answers 2. Conversion Cost for BlueDenim last week was: A. $68,000 B. $150,000 C. $78,000 D. None of the Above Answers 3. Total Production Cost for BlueDenim last week was: A. $68,000 B. $150,000 C. $78,000 D. None of the Above Answers 4. Per Unit Product Cost for BlueDenim last week was: A. $8 B. $5 C. $78 D. None of the Above Answers 5. Per Unit Prime Cost for BlueDenim last week was: A. $8 B. S5 C. $4.20 D. Cannot be determined 6. Per Unit Step Cost for BlueDenim last week was: A $8 B. $17.45 C. $4.20 D. Cannot be determined 7. The relevant range is the range of output over which the assumed cost relationship is valid. A True B. False 8. When the true total cost function increases at a decreasing rate, such costs are called semi- variable costs. A. True B. False 9. Typically if you buy more, the total cost should increase - but, the per unit cost should decrease. A. True B. False