You received this credit because your subscription with a recurring charge being billed in advance changed during this billing ...

You received this credit because your subscription with a recurring charge being billed in advance changed during this billing period.{10}{10}On your previous bill, we charged you {6} in advance.  You only used the service from {7} to {8}.  So, this credit represents the difference from {1} to {2}.  This is a period of {3} days.{10}{10}To calculate the credit, we used a daily rate of {4}.  The daily rate was calculated taking {6} and dividing it by the number of days in the period.  So, we took the period of {3} days and multiplied it by {4} giving you a credit of {5}.{10}