Hide calculated ratings from employees but show both employee and manager calculated ratings to MGR

Summary:

We would like the ability to hide calculated rating from employees during their performance assessment. Managers, however, need the ability view both 'Employee Calculated Rating' and 'Manager Calculated Rating'.

Content (please ensure you mask any confidential information):

We have a requirement to show the calculated ratings only to managers. Employees give themselves a rating on each individual item, but the calculated ratings for each section should be calculated behind the scenes and hidden from the employee. During the managers appraisal, the employees calculated rating should show to them as well as the managers calculated rating for each section in the document.