How to do contra account between customer & supplier?

Scenario: 

• You are selling Canvas Wood Frame to PINEAPPLE COMPUTER SYSTEM SDN BHD value RM600
• You are also buying Epson Original Inks from PINEAPPLE COMPUTER SYSTEM SDN BHD value RM600
• You would like to do a Contra for this sales and purchase. 

1. First, create a Wallet named Contra. 

i) "Type" choose "OTHERS"

ii) "Name" key in "Contra" 

iii) Click on "Payment method", 

iv) Click "Add New" name the new payment method "Contra". Tick “Payable" and "Receivable". 

iv) Remove other Payment method. 

v) Click "Save"

2. In Sales invoice

i)   Key in your sales invoice as usual.

ii)  Select "Contra" as your payment method (Refer here if you don't know how to choose other payment method). 

iii) Click Save 

3. Same for Purchase Invoice

i)   Key in your purchase invoice as usual.

ii)  Select "Contra" as your payment method (Refer here if you don't know how to choose other payment method). 

iii) Click Save