Explanation:
Ordinary annuity calculation ( payments at END of the period year)
See image
FV = 140 000 i = decimal interest per year period = .06
C = annual deposit = ? n = periods = 19
Plug in the numbers, solve for 'C'
$ 140 000 = C * [ (1+.06)^19 -1] / .06
solving for C =$ 4146.92
19 years of deposits totals $ 78,791.49
.... the rest of the $140 000 is interest