Shipping method Cost Calculations are Wrong

My plugin calculates shipping costs and adds a rate to the cart totals. While the calculated costs are correct in the store currency, the calculated converted costs are incorrect. I have pasted my calculate_shipping method in my custom shipping method below. I always end up with a total shipping cost equal to the equivalent of $1… even though the value is correctly calculated when displayed in the store default currency.

public function calculate_shipping($package = array())
{
$weight = 0;
$cost = 0;
$country = $package[‘destination’][‘country’];
if ($country == ‘IN’) {
$maxQuantity = 0;
$maxProductWeight = 0;
foreach ($package[‘contents’] as $item_id => $values) {
$_product = $values[‘data’];
$productWeight = $_product->get_weight();
$weight = $weight $productWeight * $values[‘quantity’];
if ($productWeight > $maxProductWeight) {
$maxProductWeight = $productWeight;
}
if ($values[‘quantity’] > $maxQuantity)
$maxQuantity = $values[‘quantity’];
}
$weight = wc_get_weight($weight, ‘kg’);
$weightLimit = (int) $this->settings[‘weight’];
// Start splitting the package….
if ($maxProductWeight 0) {
$numPackages ;
$weight = min($unsplitWeight, $weightLimit);
// 1 Compensation of $0.50 Charge Cost per 500g assumed to be USD 1.00
$priceFromWeight = 1.5 ceil($weight * 2) / 2;
$costing = $priceFromWeight;
$cost = $costing; // Increment total cost
$unsplitWeight -= $weight; // Next iteration of the loop should work on balance weight
}
}
error_log($cost);
}
if (!empty($cost)) {
$rate = array(
‘id’ => $this->id,
‘label’ => $this->title . ‘ ‘ . nv_wc_shipping_method_hint_html(‘2-3’, __(‘days’, ‘nv’)),
‘cost’ => $cost,
‘meta_data’ => array(
‘split_packages_num’ => $numPackages
)
);
$this->add_rate($rate);
}
}