Which of the following is TRUE concerning throughput costing? Question content area bottom Part 1 A. Throughput contribution is the sum of revenues and direct costs. B. Throughput contribution is the difference between revenues and variable direct labour. C. Throughput contribution is the difference between revenues and variable direct materials costs. D. Throughput contribution is the difference between revenues and direct costs. E. Throughput contribution is the difference between revenues and (variable direct labourplusvariable direct materials)