custom_script_example.php

<?php

// Pseudo code

// Attibute quantity coefficient map
// it only contains attrA and attrB because other attributes are more dynamic
$attr_qty_map = array(
    'attrA' => 1,
    'attrB' => 2,
    'attrE' => 0,
);

// dynamic qty
$attr_qty_map['attrC'] = $other_field * $oplage;
$attr_qty_map['attrD'] = $dynamic_field * 10 + $oplage;

if ($field_checkbox) {
    $attr_qty_map['attrE'] = $oplage * 10;
}


// I pass in 'attrA', but it should be $id_attriute_A
$attibute_attrA = getTierPrice('attrA', $attr_qty_map['attrA']);
$attibute_attrB = getTierPrice('attrB', $attr_qty_map['attrB']);
$attibute_attrC = getTierPrice('attrC', $attr_qty_map['attrC']);
$attibute_attrD = getTierPrice('attrD', $attr_qty_map['attrD']);
$attibute_attrE = getTierPrice('attrE', $attr_qty_map['attrE']);