To find Eduardo's pre-tax income after his 401(k) contribution, we need to calculate the amount he contributes to the 401(k) and then subtract that from his annual salary.
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Calculate 16% of his annual salary: \[ \text{Contribution} = 0.16 \times 82,400 = 13,184 \]
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Subtract the contribution from his annual salary to find his pre-tax income: \[ \text{Pre-tax income} = 82,400 - 13,184 = 69,216 \]
So, Eduardo's pre-tax income is $69,216.