Simplified formula to move data from one sheet to the next available row or cell of another sheet when a number is entered into a cell range?

I am trying to put together a flat rate system for our dealership. It is still in the very early stages of being formed, but I would like it to have the ability to move a whole row of data to a quote form (another sheet) when a number such as "1 or 2" has been entered into a specific range of cells, and then multiply the number entered into the specified range, in the event that the flat rate code needs to be used more than once on a service quote. I have been able to accomplish this on a cell to cell basis with the formula listed below. (note that 90AAAAAAA is the name of the sheet that I am pulling data from, Cell B9 is the cell that will activate the formula, if it is a value greater then 0.5, C9 is the cell the data will be pulled from if activated by cell B9, and as mentioned above, I wanted it to multiply the number in C9 by the activation value in B9):

=IF('90AAAAAAA'!B9>0.5,'90AAAAAAA'!C9,"")*('90AAAAAAA'!B9)

So, I have a few questions:

1.
How can I make this formula pull data from not only multiple cell ranges (i.e. C9:C500) and have it be activated by multiple cell ranges (i.e. B9:B500), but also pull from approximately 50 different sheets?

2.
Is it even possible without a complex string?

3.
Is it possible if I copy and pasted the above formula 491 more times for each one of the cells I would like it to pull data from, then do this for each sheet I would like to pull data from? (I realize that that’s like 25,000 formulas, but I guess the question I am asking there is, is there a limit on how characters can be entered into the formula box?)

4.
Lastly, if we were able to figure the above questions out without a complex string, would we be able to have the formula move the data described to the next available row? Because when we are going to be putting together a quote, we are probably going to be using several different codes at random and would like them to automatically go into the quote form neatly. Again, if this isn't possible without a complex string, then we maybe shouldn't worry about it, because that is something that is out of my very limited book of knowledge when it comes to Microsoft Excel.

A copy of what I am beginning to work on has been attached, if that will help explain things any better.

Thank you!