If you want to have 200,000 at the end of a 5 year period with 6% nominal interest compounded monthly. Jane does the first contribution at the end of the month assuming its the start of January.

 

Jane contributes x at the end of every 2 months ( JAN MARCH MAY) and Tom contributes every 2 months starting in Feb ( FEB APRIL JUNE) and they both don't contribute at the end of every 2 months ( NOV AND DEC) 

What is X?