Package - Lens Price list

It is now possible to assign the lenses to a different pricelist for packages. 

One reason for this is that if a customer has a special pricelist for a lens and a good price on the frame then the package discount can turn out to be positive number and not a minus number, not the best outcome. 

Annapurna works by calculating the price as normal and then applying a discount to bring the price down to the package price.  Using this, we can avoid the situation above so that the package pricelist is set to the standard pricelist for the lens then this will increase the price before the package discount and thus make the package discount saving appear larger.