Ambiguous bonus calculation prevents exact total wages Steps: - Basic pay per worker: 40 hours × $70/hour =$ 2,800. - Total basic pay for 20 workers: 20 × $2,800 =$ 56,000. - Extra units per worker: 145 – 120 = 25. - Bonus rate: 20% × $70 =$ 14 per extra unit (assuming per-unit payment), bonus per worker: 25 × $14 =$ 350, total bonus: 20 × $350 =$ 7,000. - Total wages: $56,000 +$ 7,000 = $63,000 (does not match choices). Not enough information: Bonus phrasing ("20% basic rate per hour for each product") is ambiguous—lacks clarity on whether it's per unit, equivalent hours, or proportional to time/production. Why A is correct: - Likely intended answer per source, but calculation yields$ 63,000; choices suggest possible error in problem numbers (e.g., rate as $7/hour yields ~$ 6,300– $7,020 range with variations). Why the others are wrong: - B: Possible miscalculation of basic at lower rate (e.g.,$ 7/hour without full bonus). - C: May assume higher rate or include unrelated costs (e.g., $70/hour for fewer workers plus overtime). - D: Likely overestimates bonus …

Explanation