Natalie and Kurt are married taxpayers who file jointly. For the current year, they reported an AGI of $$68,000.$ Natalie received $$15,000$ in Social Security benefits and Kurt received $$12,000$ in Social Security benefits. Calculate their provisional income.

A$)$ $$0$

B$)$ $$68,000$

C$)$ $$81,500$

D$)$ $$95,000$