The details returned as part of the GET/api/order/:id method in the order_totals field.

FieldDescription
currencyThe currency you payed in. Sent in ISO 4217 format. eg Australian Dollar is AUD
product_priceThe price of the product at time of purchase
qtyTotal amount of items purchased
subtotalThe subtotal of the order (calculated by the equation product_price x qty)
shipping_costThe cost of the shipping at time of purchase
order_feeThe cost of the service fee at the tiem of purchase
order_totalThe total paid for the order (calculated by the equation subtotal + shipping_cost + order_fee)