I have just started using Zoho for my company and I wanted to make purchase order.

My supplier charges fix 2% as packing & forwarding on Total amount of material and then they charge me tax.

For example,

Material 1 = 100 Rs

Material 2 = 200 Rs

Material 3 = 300 Rs

Total = 600 Rs

Packing & Forwarding = 2% = (Total * 2%) = 12 Rs

GST (As applicable) = (Total + Packing & Forwarding) = (600 Rs + 12 Rs) = 612 Rs

Can you please guide me how to do it as it is very much basic feature I need