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Manny, a calendar-year taxpayer, uses the cash method of accounting for his sole proprietorship. In late December he performed $21,000 of legal services for a client. Manny typically requires his clients to pay his bills immediately upon receipt. Assume Manny's marginal tax rate is 24 percent this year and next year, and that he can eam an after-tax rate of return of 6 percent on his investments. What is the net benefit of collecting the bill in December? QUESTION 4 Manny, a calendar-year taxpayer, uses the cash method of accounting for his sole proprietorship. In late December he performed $21,000 of legal services for a client. Manny typically requires his clients to pay his bills immediately upon receipt. Assume Manny's marginal tax rate is 24 percent this year and next year, and that he can eam an after-tax rate of return of 6 percent on his investments. What is the net benefit of collecting the bill in January