Insufficient data for prime cost calculation

Steps:

• Prime cost = direct materials used + direct labor + direct expenses (excludes overheads and inventories).
• Given: closing finished goods inventory ($2080), closing WIP ($1860), factory overheads ($1550).
• No data on direct materials, direct labor, or direct expenses provided.
• Cannot compute prime cost without these essential components.

Why B is correct:

• Not enough information; no option can be verified as prime cost lacks required direct cost details.

Why the others are wrong:

• A: Arbitrary sum, ignores missing direct costs.
• C: Possible addition of inventories + overheads ($2080 +$1860 + $1550 =$5490, not $8600), but irrelevant to prime cost.
• D: No basis in given data or prime cost formula.

Final answer: Not enough information.