问题如下：
7. Assuming an annual return of 7.5 percent, what would be the after-tax wealth accumulated in 15 years for a single current contribution to the TDA? Assume the contribution would be deductible but taxed at the end of 15 years at a 20 percent tax rate.
选项：
A.€23,671.
B.€23,965.
C.€29,589.
解释：
A is correct.
FVIFTDA = (1 + r)n(1–Tn)
FVIF =€10,000[(1 + 0.075)15(1–0.20)] =€23,671
老师您好，我想请问一下这里的The contribution would be deductible的意思是指把钱放进账户里不额外交税了？还是指从账户里取出来的时候可以抵减FV(在FV的基础上减去contribution的value)，这样FV的税基就没那么高了？我也看了各位老师的回答，但是可能最后意见不是很明确统一。
