On February 1, 2025, the following transactions took place:

1. Alpha Corporation purchased $28,000 of inventory on credit from Beta Suppliers.
2. Beta Suppliers granted a $3,500 discount to Alpha Corporation for early payment of the invoice from Transaction 1.
3. Gamma Enterprises paid $20,000 in cash for marketing services provided by Delta Marketing.
4. Delta Marketing provided $8,000 worth of advertising services to Epsilon Solutions on credit.
5. Epsilon Solutions returned $4,500 worth of unused marketing materials to Delta Marketing.
6. Zeta Industries sold equipment for $40,000 cash to Theta Corporation.
7. Theta Corporation paid $6,000 for consulting services provided by Iota Consulting.
8. Iota Consulting granted a $900 discount to Theta Corporation for prompt payment of the consulting invoice.
9. Kappa Ventures received a $15,000 loan from Lambda Bank.
10. Lambda Bank charged $1,500 as interest on the loan provided to Kappa Ventures.

Please journalize these transactions for the respective companies involved.