Clayton owns and operates an auto repair shop. His net profit in $2022,$ reported on his Schedule Question $7$ of $75.$ C$,$ Profit or Loss from Business $($Sole Proprietorship$),$ was $\backslash (\backslash$$ $140,000\backslash ).$ This was Clayton's only source of income during the year. He did not claim the self$-$employment health insurance deduction. What is the amount of self$-$employment tax he must pay?