Can anyone recommend a discount app for specific product bundles?

[BingoBango]

Hi All, 

Can anyone recommend a discount App that will allow me to do the below;

List Product A for X amount

If customer buys just product A they pay £X. 

However, If customer buys Product A alongside product B,C,D or E - Product A is reduced by X%. 

What I would like is for this discount to be worked out on a 1 to 1 basis, i.e 10 x Product B, C D or E will mean 10 x Product A at a discounted rate. 

Hopefully this makes sense, any recommendations are much appreciated. 

Thanks.

[g_langenderfer]

Is this what you mean?

No discount

Product Price

1 A	£X
total	£X

Discount

• say a customer buys A and one of the above
• we apply Y% discount to A

Product Price

1 A	(1-Y%) * £X
1 B	£Z
total	(1-Y%) * £X + £Z