PHP - Unable to get proper commission amount on checkout page

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PHP

As the title says, I am unable to set the proper amount of commission on checkout page.

Here's the situation:

The commission is charged for 2 peoples - Person K and Person J, based on the product's total amount, and not on the cart's total amount.

I am getting the commission amount, but I cannot set it correctly.

Based on Product A Total, Product B Total, and Product C Total, I have to calculate the commission. Commission rates are 5%, 6%, 8% respectively for all three products.

Now, Product A and Product C belongs to the Person K. Product B belongs to the Person J. Meaning, Product A's and Product C's commission should be transferred to Person K's account and Product B's commission should be transferred to Person J's account.

I have calculated the commission inside while loop which shows the person's commission correctly and stored the commission amount in $_SESSION variable.

Now, when I move the $_SESSION code out of the while loop, it takes the last value, meaning it overrides the first value.

So my question is, how do I bifurcate the commission amount and transfer it to the respective person account ?

Any help is greatly appreciated. Thank you.

Here's the actual source code of what I am trying to do..

if ( isset( $_SESSION['cart'] ) && $_SESSION['cart'] != "" ) {
    $total = 0;
    $subTotal = 0; $sbTotal = 0;
    $taxAmount = $tax = $totalTaxAmount = $taxAmt = 0;
    $cartWeightPerProduct = $totalCartWeight = $amtWeight = 0;
    $affiliateCommission = $affComm = 0;
    $affiCode = "";

    $sql = "SELECT p.*, c.*, ws.*, m.*, a.* FROM products p, categories c, weight_shipping ws, moderators m, affiliates a WHERE ProdCode IN (";
    foreach ( $_SESSION['cart'] as $id => $value ) {
        $sql .= '"'.$id.'",';
    }
    $sql = substr( $sql, 0, -1 ) . ") AND p.CatId = c.CatId AND ws.ProdId = p.ProdId AND m.ModCode = p.ModCode AND a.AffiCode = p.AffiCode";

    if ($validate->Query($sql) == TRUE) {
        if ($validate->NumRows() >= 1) {
            while ( $row = $validate->FetchAllDatas() ) {
                echo '<td><img src="images/Products/'.$row['ProdCode'].'.jpg" alt="'.$row['ProdCode'].'"><a href="product.php?code='.$row['ProdCode'].'" >'.$row['ProdName'].'</a></td>';
                echo '<td>'.$row['ProdCode'].'</td>';
                echo '<td><p>Rs. '.$row['ProdRate'].'</p></td>';
                echo '<td>'.$_SESSION['cart'][$row['ProdCode']]['quantity'].'</td>';

                $sbTotal = $row['ProdRate'] * $_SESSION['cart'][$row['ProdCode']]['quantity'];
                $subTotal = $sbTotal;
                echo '<td><p>'.number_format($sbTotal, 2).'</p></td>';
                $total += $subTotal;
                $_SESSION['cartTotalAmount'] = $total;
                $tax = $row['CatTaxPercent'];
                $taxAmt = (($sbTotal * $tax ) / 100);
                $taxAmount += $taxAmt;
                $amt = 0;
                $cartWeightPerProduct = ($row['weight'] * $_SESSION['cart'][$row['ProdCode']]['quantity']);
                echo '</tr>';
                $totalCartWeight += $cartWeightPerProduct;

                $affComm = $row['ProdAffCommision'];
                $affiCode = $row['AffiCode'];

                $_SESSION['ProductCommission']['Moderator'] = ($sbTotal * $row['ProdModCommission'] / 100);
                $_SESSION['ProductCommission']['Affiliate'] = ($sbTotal * $affComm / 100);
            }
            $totalTaxAmount += $taxAmount;

            $_SESSION['cartWeight'] = $totalCartWeight;

            if ( isset( $_SESSION['credits'] ) && $_SESSION['credits'] != "" ) {
                $cred = number_format( $_SESSION['credits'], 2 );
            } else {
                $cred = number_format( 0, 2 );
            }

            $sessAmnt = ($total + $totalTaxAmount);
            $totalPayableAmnt = $sessAmnt + $_SESSION['TotalWeight'];

            $_SESSION['sessionTotalPayable'] = ( $totalPayableAmnt - $cred );
            $_SESSION['Presentation']['TotalPayableAmount'] = ( $totalPayableAmnt - $cred );
            if ( isset( $_SESSION['sessionTotalPayable'] ) ) {
                $amt = $totalPayableAmnt;
            } else {
                $amt = "Rs. 0";
            }

            echo '<tr><td><p>Cart Total:</p></td><td><p>'.number_format($total, 2).'</p></td></tr>';

            echo '<tr><td><p>Taxes:</p></td><td><p>(+) '. number_format($totalTaxAmount, 2) .'</p></td></tr>';

            echo '<tr><td><p>Shipping:</p></td><td><p id="shippingAmount">(+) '.number_format($_SESSION['TotalWeight'], 2).'</p></td></tr>';

            echo '<tr><t><p><b>Gross Payable:</b></p></td><td><p><b>'.number_format( $totalPayableAmnt ,2 ).'</b></p></td></tr>';

            echo '<tr><td><p>Applied Store Credits:</p></td><td><p >(-) '.$cred.'</p></td></tr>';

            echo '<tr><td><p>Total Payable Amount:</p></td><td><p >'.number_format( ($amt - $cred ), 2).'</p></td></tr>';

            if ( isset( $_SESSION['PaymentMethod']['NetBanking'] ) && $_SESSION['PaymentMethod']['NetBanking'] != "" ) {
                echo '<tr><td></td><td><button class="f_right tr_delay_hover r_corners button_type_16 f_size_medium bg_scheme_color color_light m_xs_bottom_5">Proceed</button></td></tr>';
            } elseif ( isset( $_SESSION['PaymentMethod']['COD'] ) && $_SESSION['PaymentMethod']['COD'] != "" ) {
                echo '<tr><td></td><td><button id="btnCODPayment" class="f_right tr_delay_hover r_corners button_type_16 f_size_medium bg_scheme_color color_light m_xs_bottom_5">Done</button></td></tr>';
            }

        }
    }
} else {
    echo 'Your Cart Is Empty';
}