Project Z has a current budget of $$20$ million. The project is working on a $20-$month schedule. After month $6,$ the following performance data is available: Actual Cost $($AC$)=$ $$6\mathrm{.}5$ million; Planned Value $($PV$)=$ $$6\mathrm{.}8$ million; Earned Value $=$ $$7\mathrm{.}1$ million. What would be the Estimate at Completion, assuming that current cost performance will continue for the rest of the project?

A$.$ $$20\mathrm{.}0$ million

B$.$ $$19\mathrm{.}4$ million

C$.$ $$21\mathrm{.}8$ million

D$.$ $$18\mathrm{.}3$ million