PDF Calculations - Setting a Static Price

Question

Version: Adobe Acrobat X
OS:  10.8.3
I am trying to construct a interactive PDF. This is the 2nd one I've ever made so I apologize for the dumb'ness of this question.
But I have a list down the center of the file listing the price of everything offered. Ill use round numbers for my example
500
400
350
350
200
etc
Basiclly there is a box next to each price where they can enter their QTY and I am trying to have it so the TOTAL adds it all up.
What I have done thus far is named all the boxes QTY down the list and made 2 rows hidden behind the price.
The fist row is set to Price. And this is where I get into my first question.What is the right way to set that cell to be = $500.00 I am putting 500 in both the Options Tab in properties as the default value and also putting it in the calculations tab under custom calculations script.
In my second column I have the multiplication set up Price (x) QTY
Now whats weird is in the first row. It works fine. And the total shows up If I put 2 in the QTY box it =1000 and in the total box 1000 shows up
When I go to the 2nd box I hit 2 and I get like 16,000 and it goes nuts. Not sure where its getting those numbers from. I checked the cells tha tthe calculations are pointing to and they are correct. I meesed with the calculation order and that didnt do anything.
Any help would be appreciated. 
One more thing! I have the total box linked to all the cells where the product (x) calculations are being made.
Thank You!

Answer 1

Here is a picture of the form as the user will see it.
Basically the boxes next to the price is where you add 1-2-3-4 etc for the QTY and in the total box at the bottom it adds them all up.
Here is the box in edit mode .      Text 193-194-195 is the set price box. I am not sure if I did this correctly. I have in options and in calculations both set to the price.
Text219-220-221 set as the math portion.   Example:  QtY12(x)Text194 
My total at the bottom is set to the Sum of all the Text219-220-221 etc
The only row that works is the first one. All the rows under that dont even register properly. I add 2 to the QTY and I get like 16,000. I erase it and it goes to 32,000. I have to manually go in and reset them all back to zero.