Macro To Insert Auto Sum Function In Various Rows With A Column

I have to create a spreasheet monthly that has perhaps 60 transactions. The data is in columns A - G, with columns E and F having the costs figures. I need to sum the value in column E and also in Column F every few rows. The problem is that sometimes there are two rows per transaction and other times it could be 30 rows per transaction. Where I will be lucky is that there are two rows between transactions, and the sum goes in the first empty row.

Basically what I would need it to do, from a macro point of view is to go down column E, and every time it finds the first empty row, insert an auto sum. It would then need to ignore the next row, because it too, is empty.

Just Column E - I need an autosum in the "empty row 1's)

23.00
15.00
6.00
3.00
empty row 1
empty row 2
6.00
3.00
empty row 1
empty row 2
6.00
25.00
3.25
6.32