Combining two RepeatingSum Features

This is a fairly newbie question as I am just getting into Javascripts.  I am using the RepeatingSum feature, which I have working great with Weight * Quantity for an inventory.  However, what I want to do is add a checkbox input to indicate if an item is carried or not.  The intention is for it to be easily to leave an item "off character" without much hassle.  Unfortunately, I can't seem to figure out how to make both this code and the item * weight work together.  The code examples from the Wiki I'm using I've posting below (I can get either to work, but not sure how to make them work in tandem): WEIGHT * QUANTITY on ( 'change:repeating_inventory remove:repeating_inventory' , function () { repeatingSum ( "encumbrance_total" ,"inventory",[ "item_weight" ,"item_number"]); }); WEIGHT * CARRIED CHECKBOX on ( 'change:repeating_armour remove:repeating_armour' , function () { repeatingSum ( "armour_weight" , "armour" ,[ "armour_piece" ,"armour_worn"]); }); Quick Summary: What formula would I use to effectively make Item_Weight multiplied by Item_Number multiplied by Item_Carried (Checkbox with a 0/1 result)?  Effectively, combining the two. Thanks again.  I'm not entirely understanding how Java does math or how this code works so have been trying to feel for a solution blind and have been unable to find a way to hybrid these solutions.

What is your repeating section called? In the example below I have assumed it is called repeating_gear , so you would need to replace gear  wherever it appears with whatever comes after repeating_ in your section. It's listed 3 times below - twice on the first line and once on the second line. on ( 'change:repeating_ gear remove:repeating_ gear ' , function () { repeatingSum ( "total_weight" , " gear " , [ "Item_Weight" , "Item_Number", "Item_Carried"]); }); the total_weight attribute at the start also needs replacing with the name of the attribute you want to hold the total weight/

Ah, that got it working perfectly!  Thank you very much for the help, it's working great now.  Extremely appreciated.

great!