Kathy Hansen has a revolving credit account. The finance charge is calculated on the previous month's balance, and the annual percentage rate is $21\%.$ Complete the account activity table for Kathy. $($Round your answers to the nearest cent.$)$

$\backslash$table$[[$Month$,\backslash$table$[[$Previous$],[$Month$\text{'}$s$],[$Balance$],[($in $$)]],\backslash$table$[[$Finance$],[$Charge$],[($in $$)]],\backslash$table$[[$Purchases$],[$and Cash$],[$Advances$]],\backslash$table$[[$Payments$],[$and Credits$]],\backslash$table$[[$New Balance$],[$End of Month$],[($in $$)]]],[$April$,$$$649\mathrm{.}17,$$$11\mathrm{.}36,$$$36\mathrm{.}45,$$$75\mathrm{.}00,$$$621\mathrm{.}98$