Group 1 = Date of order
Group 2 = product and current on hand
Day1
20140423 (Day 1)
product A 200
Order 1 -20
Order 2 -20
Balance 160
Product B 100
Order 1 - 5
Day 2
20140424 (Day 2)
Product C 16
Order 1 - 5
Day 3
20140425 (Day 3)
Product A 160
How do I pass the ending balance from Product A day 1
to the beginning balance for Product A day 3
Pls explain in detail because I am a novice report writer.