Formula Not Adding Correctly,

I included an attached example of a problem i am having.


Basically a cell might have a number with 3 decimal places

For Example 90.554, and i will format the cell two 2 decimal places. But when i use those cells which are formated to 2 decimal places in a formula it produces results based of all the decimal places in that cell.

Is there a way for the formula to only calculate the results based off of what is shown in the cell? . This is messing up our accounting area by alot of dollars since we sell many items.

I included an example of what i mean in this excel file which should clear up any confusion.

Thanks