A worker earns $20 per hour and works 6 hours. What is the total pay?

A. $100

B. $110

C. $120

D. $140

A shipment contains 12 boxes. Each box holds 15 items. How many items are shipped?

A. 150

B. 160

C. 170

D. 180

A machine produces 10 units every 30 minutes. How many units are produced in 3 hours?

A. 50

B. 55

C. 60

D. 65

You must order at least 200 usable units. • Supplier A: $12/unit, 15% defect rate • Supplier B: $14/unit, 5% defect rate Which supplier results in the lower total cost?

A. Supplier A

B. Supplier B

C. Same cost

D. Cannot be determined

A job requires 480 usable units completed in 48 hours.

Material cost: $18 per unit started (material is consumed whether the unit is usable or scrapped..

Scrap rule: Defects are discovered after completion; scrapped units still consume full labor time and full material.

· Worker A

o 15 units/hour

o $36/hour

o Maximum 16 hours

o 0% defect rate

o If used, A must work first (hours 1–16 only..

· Worker B

o 11 units/hour

o $22/hour

o 8% defect rate

o Unlimited hours

· You may switch workers at any time (except A must be scheduled first if used..

Which strategy results in the lowest total cost while meeting the requirement?

A. Use Worker A first, then Worker B

B. Use Worker B first, then Worker A

C. Use only Worker A

D. Use only Worker B