In my bank statement there are a few incoming transactions such as 800 or 1000 or 2500 apart from my monthly salary. These amounts are mine which my friends have paid back to me as I have paid for various things (such as we were traveling together, or having dinner together, the bill is paid by me through my credit card, and their share is paid back to me from their bank account online).
How can I justify this scenario to visa officers while submitting the application for a UK visitor visa?