Macros Help in Excel

Hi,

I was wondering if anyone could help me please? I would like to be able to use a macro to assist in me an excel spreadsheet.

The task is:
There is data in Columns A to E with up to 150 rows. For each row the data needs to be copied from column D into column G.
For each cell in column G would like to "insert comments" using data in column A and C having a hypen between the data.

Col A Col B Col C Col D Col E Col F Col G
A/C Chq Supplier Amount Date S/S
A16 245545 ABC 156.00 15/07/16 156.00

My knowledge of Macros is very limited and any assistance I could get would be greatly appreciated as it would save me a lot of time in a very repetitive task.

Many thanks