Get Max(Value) based on dimension

Hello,

I always have problems with aggregations in formulas, maybe someone can clarify how to overcome this problem in WebI (4.1).

I have a simple dataset:

Company_ID     Value     Date

1                          10         20140101

1                          20         20140102

2                          30         20140103

2                          40         20140104

I want to get the Max(Value) based on the Sum per Company_ID, so the desired result would be 70.The important thing is, that I don't want to display this value (70) in a table with my Company_ID together. I need it as a single measure-formula, which just returns me the 70, independently if I show it in a table or not.

Backround: I actually need this for a bubble chart, where the companies are my bubbles "Value" is used as the bubble size. If the "Value" of the bubble is 0, it shouldn't be invisible, so I have to use a minimum-value for the bubble-size instead of 0. This minimum-value should be depending on the Max-Value shown in the bubble chart (Like: Min-Bubble-Size=Max-Bubble-Size/20).

Any ideas? thanks!