Java program is needed. If you can, please give me some note on the program so I can understand what is going on. Again, I need it in JAVA.

Thank you!

Problem: A non-governmental organization needs a program to calculate the amount of financial assistance for needy families. The formula is as follows:

-- If the annual household income is between $30,000 and $40,000 and the household has at least three children, the amount is $1,000 per child.

-- If the annual household income is between $20,000 and $30,000 and the household has at least two children, the amount is $1,500 per child.

-- If the annual household income is less than $20,000, the amount is $2,000 per child.