#### Principal (initial amount), P = 18,800,000

#### Annual simple interest rate, R = 12%

#### From date: Feb 23, 2018

#### To date: Mar 23, 2018

#### Duration, T = 28 days

#### Commission fee (withdrawal or payment), F = 4%

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

## I = Simple interest:

#### I = (P × R × T) ÷ N =

#### (18,800,000 × 12% × 28) ÷ 365 =

#### (18,800,000 × 12 × 28) ÷ (365 × 100) =

#### 6,316,800,000 ÷ 36,500 ≈

#### 173,063.013698630137 ≈

#### 173,063.01

## B = Amount earned before deducting the

commission fee (withdrawal or payment):

#### B = P + I =

#### 18,800,000 + 173,063.013698630137 =

#### 18,973,063.013698630137 ≈

#### 18,973,063.01

## D = Amount earned after deducting the

commission fee (withdrawal or payment):

#### D = B - F =

#### B - F% × B =

#### (1 - F%) × B =

#### (1 - 4%) × 18,973,063.013698630137 =

#### 96% × 18,973,063.013698630137 ≈

#### 18,214,140.493150684932 ≈

#### 18,214,140.49

## Pr = Investment profit:

#### Pr = D - P =

#### 18,214,140.493150684932 - 18,800,000 =

#### - 585,859.506849315068 ≈

#### - 585,859.51