Hi all, I am trying to make a spreadsheet that has the following:

| Col A | Col B | Column C | Column D | Column E | Column F |
| Name | Identifier | Size of lesion (a,b,c) | Risk (high/low) | Date of service | Date of Follow-up |

What I am looking for is if I put in:

size a and low risk, date of f/u = None needed
size a and high risk, date of f/u = <date of service + 365> (one year)
size b and low risk, date of f/u = <DOS + 365>
size b and high risk, date of f/u = <DOS + 180> to <DOS + 365>
size c and low risk, date of f/u = <DOS + 180> to <DOS +365> AND <DOS + 545> to <DOS + 730>
size c and high risk, date of f/u = <DOS + 90> to <DOS + 180> AND <DOS + 270> to <DOS + 365>

I hope that makes sense and someone can help me out on this.
Thanks,
Criss (Sifubear)