Macro to Copy and Paste contents of one Cell depending on the lookup of another

[Grf]

Hello everyone,
As my VBA skills only reach to looking and modifying recorded Macros, I'm pretty much stuck on this one.
I have two sheets named Payments and Invoices. In a macro, I want to match the contents of Invoices cell P1 to where it occurs in Payments Column E then into the corresponding cell (row) in Column C of the Payments Sheet, copy and paste the contents of Invoices cell C43. Is this possible? If anyone could start me off I’d be most obliged.
Regards
Graham

[Bishonen]

it is possible and should be quite easy. As I'm lazy tho, please attach a workbook and mark (with a color/comment or in any other way) what has to be done ^^

[Grf]

Hi Bishonen
As requested I attach a workbook named Payments2 which has 2 sheets, PAYMENTS and INVOICES. What I would like is a macro which will copy and paste the value of INVOICES!C43 into the cell in PAYMENTS! B:B which is on the same row as the unique match found in PAYMENTS!E:E and INVOICES!P1
Thanks in advance
Graham