Fluctuating status related to Date

Hi everyone

I need to create a formula that will calculate the status of a customer based upon an input code and the relevent date.

The attached workbook is very simplified but should help.

Sheet1 contains the date of input (col A) for the client (col B) plus a code in column C to help ascertain the initial status of the a/c.

In Sheet2 (col B) I need a formula or possibly a VBA solution that will create a commission status for clients with 'N' in column C of Sheet1 which is current for 8 weeks after the input date in Sheet1. Thereafter this status then need to show say an 'S' for standard commission.

This result will be linked to the date shown in B2 on Sheet2. Just to make it clear, I only need a letter as the result to trigger off the actual commission calculations, which I have already done.

I hope that I have explained it clearly, if not, let me know.

TIA ...spellbound