FIlamentPHP Repeator updating individual items

Hi Everyone,

I'm playing around with FilamentPHP and trying to learn some new things but I'm a little stuck on an issue I'm having and hoping someone could point me in the right direction.

I've created a small function that loops over all of my items in my invoice resource form and calculates a subtotal and total. This works great. Adding it here in case anyone needs this part in the future.

public static function updateTotals(Get $get, Set $set): void {
        $lineItems = $get('items');

        $subtotal = 0;
        foreach($lineItems as $item) {
            $linetotal = ($item['quantity'] * $item['rate']);
            if($item['discount_type'] === 'fixed') {
                $linetotal -= $item['discount'];
            } else {
                $linetotal -= ($item['discount'] / 100 * $linetotal);
            }
            $subtotal += $linetotal;
        }

        $set('sub_total', number_format($subtotal, 2, '.', ''));
        $set('total', number_format($subtotal - ($subtotal - ($get('discount'))) + ($subtotal * ($get('tax') / 100)), 2, '.', ''));

    }

The issue I'm having is with my updateLineTotal function.

public static function updateLineTotal(Get $get, Set $set): void {
        $lineTotal = $get('items.quantity') * $get('items.rate');
        if($get('items.discount_type') === 'fixed') {
            $lineTotal -= $get('items.discount');
        } else {
            $lineTotal -= ($get('items.discount') / 100 * $lineTotal);
        }
        $set('line_total', number_format($lineTotal, 2, '.', ''));
    }

Here is the basics of my repeater.

Repeater::make('items')
		->schema([
				TextInput::make('title')
						->required(),
				TextInput::make('quantity')
						->numeric()
						->default(1)
						->live()
						->afterStateUpdated(function (Get $get, Set $set) {
								self::updateLineTotal($get, $set);
						}),
				TextInput::make('rate')
						->numeric()
						->default(0.00)
						->live()
						->afterStateUpdated(function (Get $get, Set $set) {
								self::updateLineTotal($get, $set);
						}),
				TextInput::make('discount')
						->numeric()
						->default(0.00)
						->live()
						->afterStateUpdated(function (Get $get, Set $set) {
								self::updateLineTotal($get, $set);
						}),
				TextInput::make('line_total')
						->numeric()
						->default(0.00)
						->readOnly()
		])
		->live()
		->relationship()
		->afterStateUpdate(function (Get $get, Set $set) {
				self::updateTotals($get, $set);
				self::updateLineTotal($get, $set);
		});