Would someone be kind enough to enter the following code into an Excel Spreadsheet and attach it in this thread. Thanks!

Simple one-period returns:
let g = Grantors money
let p = Participants money
let m = Market returns
let r = Guaranteed rate of return to the low income savers

let G = g/p = ratio of grantors' money to participants' money

g * (1+m) ≥ p * (1+r)
G ≥ (1+r)/(1+m)
r ≤ G*(1+m) - 1
m ≥ (1+r) / G - 1