Concept:Prime cost is the sum of all direct costs — mainly direct materials and direct labour — incurred in manufacturing a product.Explanation:Prime cost does not include factory overheads, administration expenses, or selling costs.From the given information, direct materials cost =N64,000.Direct labour cost =N30,000.Apply the formula:Prime cost = Direct materials cost + Direct labour cost.Prime cost =N64,000+N30,000.Prime cost =N94,000.Hence, the correct option is B.Answer:N94,000 (Option B).