Need help calculating the value of my retirement portfolio at the end of each of the first five years I work. Assume that the amount I contribute each year is divided into 12 equal amounts which I deposit at the end of each month (periodic deposits). Assume that the retirement account earns a nominal annual rate of return of 6%, compounded monthly.

Heres how much I contribute each year

First Year: $2,696.70

Second Year: $2,966.37

Third Year: $3,263.01

Forth year: $3,589.31

Firth Year: $3,948.24