installment_totals=Array
(
    [subtotal] => 0
    [subtotal_tax] => 0
    [shipping_total] => 0
    [shipping_tax] => 0
    [shipping_taxes] => Array
        (
        )

    [discount_total] => 0
    [discount_tax] => 0
    [cart_contents_total] => 0
    [cart_contents_tax] => 0
    [cart_contents_taxes] => Array
        (
        )

    [fee_total] => 0
    [fee_tax] => 0
    [fee_taxes] => Array
        (
        )

    [total] => 0
    [total_tax] => 0
)