Final answer:
The monthly cash inflow after a 20 percent tax deduction from an $80 weekly earning, assuming 4 weeks in a month, is $256.
Step-by-step explanation:
To calculate your monthly cash inflow after taxes from a weekly earning of $80 with a 20 percent tax deduction, you start by computing the weekly after-tax income and then the monthly income. First, determine the amount taken out by taxes each week by multiplying $80 by 20%, which equals $16. Subtract this amount from the weekly gross pay to find your after-tax weekly income:
$80 - $16 = $64 (after-tax weekly income)
Since there are typically 4 weeks in a month, you would then multiply the after-tax weekly income by 4 to get the monthly cash inflow:
$64 × 4 = $256 (monthly cash inflow, rounded to the nearest hundredth)
Therefore, the monthly cash inflow is $256 after accounting for the 20 percent tax on the weekly paycheck.