Terms of a $7,000$ loan are as follows

$60$ equal monthly payments starting at the end of the first month, $8\%$ nominal interest rate convertible monthly

An alternative is offered:

Monthly payments calculated as above.

First payment not due until the end of the fifth month.

An extra payment made at the end of the $60$th month for the balance of the loan. Determine the amount of the extra payment in the alternative payment scheme.

$799\mathrm{.}42$

$804\mathrm{.}75$

$826\mathrm{.}42$

$831\mathrm{.}93$

Please give a right solution.