2 different class applied to 1 product

ok basically, i have the normal taxes of the country wich is a pourcentage.

but there is a new taxe on electronic devices that is a fixed price for all kind of devices.

for exemple : display = 12 $
computers =8 $
laptop = 2$

So i want to be able to first : apply the electronic devides fixed taxes (i want to be able to put it when i enter a new product)

and then, i want to apply the normal taxes on the product.

so i was wondering if there is an extansion that could allow to add 2 different classes of taxes for 1 item.

the alternative i am using is to create like 12 classes that each one has the "kind of item + normal country taxes"

thanks