We start with Brenda having 1 unit.

Brenda: 1 unit
Harith: 5 units
Amirul: 1 unit + 47

We can see that Harith receives $61 more than Amirul, so...

5 units = 1 unit + 47 + 61
5 units = 1 unit + 108

5 units is greater than 1 unit by a value of 4 units, so...

4 units = 108
1 unit = $27

So, Brenda has $27, Harith has $135 and Amirul has $74, for a total of $236,

The model to draw is something like this.

(I can't draw a proper model due to limitations of the text box feature)

Let me use ••• to represent 1 unit, with | separating the units.

••• | ••• | ••• | ••• | ••• for Harith
••• | (47) for Amirul

The difference between the two is $61, and you can include this accordingly in your model diagram.