Arbitrary Twin Pricing for Members

Here is the challenge:

90% of my customers are to buy goods at the stated retail price (A)
10% of the customers are part of s a special group who can buy at discounted prices (B)

I do not wish to show the 90% of the customers the special pricing as it is like teasing the natives and what they do not know does not hurt them.

For the other 10%, once they register and supply me their membership number, then I want them to be able to see the entire website with twin pricing or at least showing them that it is discounted.

The catch is that there is no structure in the discount system. it is neither a set percentage or amount off the price. Each case is different.

Ideally members would see the normal price in black and their special price in RED.

Of course the shopping cart would need to cooperate with the twin pricing too.

Is there a precedence for this sort of shop keeping?

Don_in_OZ

Just to be sure there is no simple solution - the discount for your members is not the same amount/percentage on each item, right?

yes correct - it it was the same, it would be easy and the templates are set up for that.

Don_in_OZ