Manpower Resource Planner

In the past the Manpower Company has put out a yearly spreadsheet allowing an employer to keep track of employee time off. They are not making one this year. Looking at last years sheet, all the calculations are locked. Has anyone seen this sheet in the past and know how it works? You can put in something like v8 in a dated cell and excel subtracts 8 hours from a yearly vacation total. The v in front of the 8 stands for vacation and you can also put in a p for personal time etc..