1. Find Regular Deposit
(PMT Amount) C = ?
Interest Rate i = 10%, Time n = 5 Year, Future value FV = 6105.1,
Deposit Frequency = at the end (Ordinary Annuity) of every Year (1/year)
for Future value of Annuity method

Solution:
`i=10%=0.1` per year (Interest rate)

`n=5` years (Number of periods)

`FV=6105.1` (Future value)

Now, Future value (Ordinary Annuity) formula is
`FV_("Ordinary Annuity")=C*[((1+i)^n-1)/(i)]`

`:.6105.1=C*[((1+0.1)^5-1)/(0.1)]`

`:.6105.1=C*[((1.1)^5-1)/(0.1)]`

`:.6105.1=C*[(1.6105-1)/(0.1)]`

`:.6105.1=C*[6.11]`

`:.C=6105.1/(6.11)`

`:.C=1000`

---

2. Find Regular Deposit
(PMT Amount) C = ?
Interest Rate i = 10%, Time n = 3 Year, Future value FV = 16550,
Deposit Frequency = at the end (Ordinary Annuity) of every Year (1/year)
for Future value of Annuity method

Solution:
`i=10%=0.1` per year (Interest rate)

`n=3` years (Number of periods)

`FV=16550` (Future value)

Now, Future value (Ordinary Annuity) formula is
`FV_("Ordinary Annuity")=C*[((1+i)^n-1)/(i)]`

`:.16550=C*[((1+0.1)^3-1)/(0.1)]`

`:.16550=C*[((1.1)^3-1)/(0.1)]`

`:.16550=C*[(1.331-1)/(0.1)]`

`:.16550=C*[3.31]`

`:.C=16550/(3.31)`

`:.C=5000`

---

---