Mackenzie is a full$-$time employee in Austin, Texas, who earns $$4,490$ per month and is paid semimonthly. She is married filing jointly with one dependent under $17$ and has indicated Step $2$ checkbox withholding. She has a qualified health insurance deduction of $$50$ per pay period and contributes $3\%$ to her $401($k$),$ both of which are pre$-$tax deductions. Her additional withholding amount for step $2$ is $$150\mathrm{.}75.$ What is her semimonthly net pay?