Work with all of your vendors to identify alternative cleaning products that meet the credit criteria. Remember that only purchases that take place during the performance period apply to the credit calculations and so cleaning activities that occur infrequently may not be included if they take place outside of the credit performance period.

Question
How should we account for cleaning practices that are done by an outside vendor and only once or twice a year—for example, stone polishing performed semi-annually by a stone polishing company or window cleaning performed quarterly?