How does the travel agency do the accounting? The revenue from the train tickets sold is 300, the cost is 280, and the profit is 20. What attachments are attached to the voucher? Thank you!

When the travel agency goes to the train station to buy the ticket itself

Debit: other business costs - train tickets 280

Credit: cash on hand 280

When sold to tourists

Debit: cash on hand 300

Credit: other business income 300

When income and costs are carried forward at the end of the period

< p> Debit: Other business income 300

Credit: Profit this year 20

Other business costs - train tickets 280

No attachments when purchased, sold There are invoices from time to time. I hope what I wrote can give you some tips. Not very professional.