1. For columns C and F, users cannot enter negative numbers
2. If users enter negative, target.value becomes 0 and prompts users with message
3. If user either enter numbers for C or F, the column H of that row will get TRUE for the update.
This technical paper will help you implement VMware’s VM encryption as well as implement Veeam encryption which together will achieve the nothing ever in the clear goal. If a bad guy steals VMs, backups or traffic they get nothing.