Display product with many price group

[marczaq]

Hi

I have 2 problems:

Firstly I have a lot of product with 3 or 4 price group like: 

 

1.Retail group

2.Wholesale group

3. Discount group 

 

Customer X have 2 groups  (2 and 3 - 2 is default)

When Product have 2 group as 100 $ and 3 as 90 He see cost like 100$.

How to set sth so that the customer could see 90$? (less price)

 

When 1 change default group to 3 (less price) customer see 90$, but the problem is when product have not this group. If product haven't 3 group then price is 0.00 $.

 

How to set price to customers have many group so that the price was the lowest?  

 

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The second problem is how to hide products which have not set groups with was added to customer.

For example

Product X have two group 2 and 3.

Customer is inside group 1. Product should be hide for this customer.

How to do it?