#### Principal (initial amount), P = 5,000

#### Annual simple interest rate, R = 2%

#### From date: Jun 6, 2017

#### To date: Jul 6, 2018

#### Duration, T = 395 days (13 Months)

#### Commission fee (withdrawal or payment), F = 17%

#### No. of days in a year, N = 365

## I = Simple interest:

#### I = (P × R × T) ÷ N =

#### (5,000 × 2% × 395) ÷ 365 =

#### (5,000 × 2 × 395) ÷ (365 × 100) =

#### 3,950,000 ÷ 36,500 ≈

#### 108.219178082192 ≈

#### 108.22

## B = Amount earned before deducting the

commission fee (withdrawal or payment):

#### B = P + I =

#### 5,000 + 108.219178082192 =

#### 5,108.219178082192 ≈

#### 5,108.22

## D = Amount earned after deducting the

commission fee (withdrawal or payment):

#### D = B - F =

#### B - F% × B =

#### (1 - F%) × B =

#### (1 - 17%) × 5,108.219178082192 =

#### 83% × 5,108.219178082192 ≈

#### 4,239.821917808219 ≈

#### 4,239.82

## Pr = Investment profit:

#### Pr = D - P =

#### 4,239.821917808219 - 5,000 =

#### - 760.178082191781 ≈

#### - 760.18