Final answer:
To calculate the incremental income after taxes, subtract the tax amount from the incremental income before taxes. The incremental return on sales is calculated by dividing the incremental income after taxes by the incremental sales. The incremental return on new average investment is calculated by dividing the incremental income after taxes by the average investment in accounts receivable.
Step-by-step explanation:
To compute the incremental income after taxes, we need to calculate the incremental sales, incremental collection costs, incremental production and selling costs, and the tax amount. The incremental sales from extending credit to new customers is $125,000. The incremental collection costs are 3% of sales, which is $3,750. The incremental production and selling costs are 80% of sales, which is $100,000. The incremental income before taxes is the difference between sales and collection costs minus production and selling costs, which is $21,250. To compute the incremental income after taxes, we need to subtract the tax amount. The firm is in the 30% tax bracket, so the tax amount is 30% of the incremental income before taxes, which is $6,375. Therefore, the incremental income after taxes is $14,875.
To calculate the incremental return on sales, we divide the incremental income after taxes by the incremental sales and multiply by 100. So, the incremental return on sales is ($14,875 / $125,000) x 100 = 11.9%.
To calculate the incremental return on new average investment, we need to find the average investment in accounts receivable. The accounts receivable turnover ratio is 6 to 1, so the average collection period is 1 / 6 = 0.1667 years. We can use this to find the average investment in accounts receivable as follows: average investment in accounts receivable = (incremental sales / 2) x collection period = ($125,000 / 2) x 0.1667 = $10,415.85. The incremental return on new average investment is the incremental income after taxes divided by the average investment in accounts receivable, multiplied by 100. So, the incremental return on new average investment is ($14,875 / $10,415.85) x 100 = 142.7%.