We want to track our aging inventory based on receipt date.  We would like to use a date range not available in the options of Zoho Analytics.  We would like to see aged inventory based on receipt date for 3 months or less / 3-6 months / 6-9 months / 9-12 months / 12 months or more.  Is this possible with formulas? If so, where can I find out how to do this?