jQuery if Statement with Multiple conditions : I need to check 3 conditions, sheet_exists = 1, recalc = 1 and qty_total and new_qty_total are not equal.

The if statement works well if only the first 2 arguments are used:

    if(sheet_exists === 1 && recalc === 'yes'){
       //do something
    }
 But when I try to add he 3rd argument it fails, the actions in the if statement are ignored

I've tried..

    if((sheet_exists === 1) && (recalc === 'yes') && (qty_total !== new_qty_total)){
       //do something
    }

And...

    if(sheet_exists === 1 && recalc === 'yes' && (qty_total !== new_qty_total)){
        //do something
    }

And...

    if(sheet_exists === 1 && recalc === 'yes' && qty_total !== new_qty_total){
        //do something
     }

Where am I going wrong?