On January 1, 2025, various companies engaged in the following transactions:

1. Alpha Corporation purchased $25,000 of raw materials on credit from Beta Suppliers.
2. Beta Suppliers granted a $3,000 discount to Alpha Corporation for early payment of the invoice from Transaction 1.
3. Gamma Enterprises paid $18,000 in cash for advertising services provided by Delta Marketing.
4. Delta Marketing provided $7,500 worth of marketing consultation services to Epsilon Solutions on credit.
5. Epsilon Solutions returned $4,000 worth of unused marketing materials to Delta Marketing.
6. Zeta Industries sold equipment for $35,000 cash to Theta Corporation.
7. Theta Corporation paid $5,500 for consulting services provided by Iota Consulting.
8. Iota Consulting granted a $800 discount to Theta Corporation for prompt payment of the consulting invoice.
9. Kappa Ventures received a $12,000 loan from Lambda Bank.
10. Lambda Bank charged $1,200 as interest on the loan provided to Kappa Ventures.

Please journalize these transactions for the respective companies involved.