Answer:
$7,900
Step-by-step explanation:
Given that:
Assuming a marginal tax rate of 21%
Salary Raise = $10000
Annual after-tax cost to Idaho :
Salary raise ( 1 - marginal tax rate)
$10000 ( 1 - 21%)
$10000( 1 - 0.21)
$10000 - $2100
= $7,900
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