I am perplexed. The problem I am working is,

Question : How much money must Carol deposit every year starting 1 year
from now at 5.5 % per year in order to accumulate $6000 seven years from
now?

My correct solution is :

> 6000/usfv(5.5,7)
[1] 725.7865

I think this should also work... but does not:
> tvm(i=5.5,n=7,fv=-6000,pmt=NA,pyr=1)

Time Value of Money model

   I% #N PV    FV    PMT Days #Adv P/YR C/YR
1 5.5  7  0 -6000 687.95  360    0    1    1

I am getting a difference PMT amount. Does anyone have an insight in why I
a getting the difference

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