Vba to loop to check value and copy results over

Hi

Wonder can anyone help.

I am trying to use a Loop and and IF and another Loop in a macro with vba.

Sheet1: Sheet_Source
Sheet2: Sheet_Display

I have unique ID in Sheet_Source and is sorted smallest to largest and also there is some ID's duplicated so I want to:

STEP 1-
In Sheet_Display Loop until next cell is blank in Column A Sheet_Source and then if there is a value in Sheet_Source Column A (ID)

STEP2-
Then In Sheet_Display Column A (ID) I want to compare the value above it is not equal to it then if it is true in that row

STEP4-
copy that ID into Column A in Sheet_Display and copy cells D from Sheet_Source to Sheet_Display Column C & F-AC in Sheet_Source to Sheet_Display E-AB

STEP3-
But if the ID is equal to the value above in Sheet_Display if there is duplicated IDs (which I have sorted together already in a macro) then loop through however many are there take the highest value from Column D of that group and do step 4.

So I will have one ID per row and it is the highest amount of and no duplicated IDs.


Can anyone help or give pointers if this is the correct approach,

Thanks.