counting checkboxes

I feel like this is an easy issue?? but I'm not getting the Text box on page 12 (Next to the word Record) to add the check boxes.

I have an attendance roster (Page 12) and want a count of all Check Boxes checked.

I created a txt box at the top next to the word Record. 

I am aware that some code dose not like spaces. 

I thought it might be a syntaxes error. between “Check Box” and “CheckBox” so I adjusted the name of the boxes for the first 15 days in July to “CheckBox” . I have tried both.

// Initialize counter variable
var sum = 0; 
// Loop through the fields
for (var i = 126; i < 499; i += 1) {
// Add one if check box is not Off
    if (getField("CheckBox" + i).value !== "Off") {sum += 1;}
} 
// Set this field's value to the sum
event.value = sum;