Custom price calculation

[char_lee88]

Hi I'm new on VirtueMart.

I'm trying to create a plugin to add some new fields with custom functionality. The e-commerce sells shirts with some printings in front and back. The product needs to  change the price depending on the number of printings or the method of impresion. Is it possible to add some fields to add this parameters, and based on the number of printings and the type of impresion add an extra value to the final price.

Also, a plugin is the best way to do this? or we can make it easier with other aproach different than the plugin?

Thanks in advance