1) Solving the Total Amount
The payment per period is $100
Putting these numbers into the formula: 
2) Solving the Periodic Payment
((1+r)^{(n+1)} 1) ÷ r equals

3) Solving for Years
Log [rate * (total/periodic amount) + (1+rate)]
Log (1+rate)
0.275829606633691 ÷ 0.00324505481314708 =

4) Solving for Rate
The annuitydue formula cannot be solved for rate.
