If raw materials inventory purchases are equal to $60\%$ of the following month's sales, $50\%$ of purchases are paid for in the month following the purchase, and the remainder is paid in the following month, what formula would you need to enter in D$12$ to find the payments in November?

$\backslash$table$[[2,$A$,$B$,$C$,$D$,$E$],[1,,,$September,October,November$],[2,$Sales,,$90,000,120,000,135,000],[9,$Purchases,$60\%,?,?,?],[10,$Payments:,,,,$],[11,$Furst Month,$50\%,,?,?],[12,$Second Month,$50\%,,,?],[13,$Total Payments,,,,?$]]$

$=B9**C2$

$=B12**C9$

$=B9**C9$

$=B11**D9$

$=B12**E9$