New email template keywords

Starting with the 2/28/08 release, the following new keywords can be used in email templates:

@baserateamount Displays the base rate.
@rateadjustmentamount Displays the rate adjustments when reservation time is shorter than minimum time.
@additionalchargesamount Display additional charges, such as cleaning fees.
@customeroptionsamount Displays amount for options selected by the customer.
@subtotalamount Displays the sub total amount.
@taxrate Displays the tax rate.
@taxamount Displays the tax amount.
@totalamount Displays the total amount.
@depositamount Displays the deposit amount.
@balancedue Displays balance due (totalamount minus depositamount).
@currencycode Displays the currency code.
@creditcardnumber Displays the last 4 digits of the creditcard number.