du yu assume him put down x$ now & it sit theer 3.5 yeers & gro from interest?
normal wae is tu add munee evree month if yu kan (but it is more komplex)
at 8%, kompound evree month
(end $)/(start 4)=1.0066666)^42
=1.321897
so $ put-up=$ want/1.321897
=5000$/1.321897
=3782.44$