Dave Brown's cumulative earnings are $$90,000,$ and his gross pay for the week is $$6,400.$ If the FICA rates are: Social Security $6\mathrm{.}2\%$ on a limit of $$142,800$ and Medicare is $1\mathrm{.}45\%,$ what are his FICA Social Security and FICA Medicare taxes for the week? $($Round your answers to the nearest whole dollar.$)$

$$ A$.$ $$397$;$$0$

$$ B$.$ $$0$;$$93$

C$.$ $$3,968$;$$928$

$$ D$.$ $$397$;$$93$