Amount is charged without a decimal place e.g. $1.5 = 150. Currencies can have different decimals/exponentials, refer to the Currencies documentation for more details. The amount provided determines the type of adjustment. If it is greater than the original pre-authorization amount, it is treated as an increment. If it is less than the original pre-authorization amount, it is treated as a decrement. To fully void a transaction after an increment, set the amount to 0.