Total Sales v Total Receipts

Total Sales v Total Receipts



Hello!

I have a questions about Zoho Invoice.

On the ,y dshboard it shows a graph of yearly income.

There are 3 numbers.
1 - Total Sales
2 - Total Receipts
3 - Total Expenses.

My question is What is the difference between Sales and Reciepts?

I would think they should be the same but maybe I made an error somewhere? 


MY numbers are as below and I do not know which is correct (I am thinking about my tax filing time in April, so I want to check it early)

Total Sales
¥934,491
Total Receipts
¥930,891

Can anyone help?

Thanks!