Formula to Sum by Month and Financial Year

[ColinAlice]

I have a spreadsheet that consists of date, product number with amount received against each date.

What I need are formulas that will automatically provide me with:
1. The sub-total monthly income for each product against each financial year.
2. Total income for each product by financial year.
3. Total income for each financial year.

I have attached the spreadsheet with an example. Hope someone can help. Thanks