A loan is set to be paid with a payment of $$350$ today and $$515$ in $10$ months at $2\mathrm{.}95\%$ interest compounded semi$-$annually. Due to insufficient funds, the payments are refinanced. A first payment of $$125$ will be made in $8$ months and a final payment in $18$ months. What is the size of the final payment? Use the partial timeline below to help you. State your answer in dollars $($$$)$ with two decimal places.

$\backslash$table$[[$today$,8mo,10mo,18mo$