To answer this question use the formula of the future value of an annuity ordinary which is
Fv=pmt [( (1+r)^(n)-1)÷r]
Fv future value 228790
PMT yearly save. ?
R interest rate 0.08
N time 28 years
Solve the formula for PMT
PMT=Fv÷[( (1+r)^(n)-1)÷r]
PMT=228,790÷(((1+0.08)^(28)−1)÷(0.08))
PMT=2,399.75 round your answer to get 2400
Hope it helps!