Processing football(soccer) results

I have some football results and I am interested in finding how many goals scored in each of the last 6 games involving each team.
The columns are league(all the same),date, Home team, Away team, first half goals, second half goals.
I need a way of finding the total goals for each of the most recent 6 games for each team, home or away.
eg. Barnsley, 1,2,2,3,4,3
The spreadsheet gets bigger every week as more results come in and I need to be able to do it without sorting.
I have spent a few days struggling with this but have not got very far. Any help would be appreciated.

Thanks

Phil