How to calculate/ include Tax on Tax...?

[Sankha]

Hi... Would like to know how to setup tax on tax...

Example:

Product A price is 100

Product B price is 200

Total price (A+B) = 300

Tax C is 10% = 30

Hence Total with Tax C = 330

Tax D is 3% of the Total 330 = 9.90

Total Payable would be 330+9.90 = 339.90

Thanks,

Sankha