matured and demandable obligation to pay a sum of money. 9. Written contract of sale of cellphone at a price of P500 entered by A and B after B pointed a gun to A's wife in order for A to give consent. 10. Oral contract of sale of T-shirt at a price of P500 entered between SM and A after the saleslady of SM said that A is handsome wearing that T-shirt. A has already paid the price. 11. Written contract of sale of authentic Coach Bag between A and B at a price of P10,000. At the time of delivery, A delivered a counterfeited Coach Bag. 12. Oral contract entered between A and B when A thought that the contract is one of commodatum while B thought that the contract is one of real deoosit. 13. A farmer and a bank entered into a contract of loan amounting to P500 with real estate mortgage over the farmer's land. The amount of cash has already been delivered to the farmer. However, the bank's legal counsel executed a deed, pacto de retro sale. What is the status of the contract of loan and real estate mortgage? 14. Oral contract of antichresis entered into between the debtor and creditor with consensual agreement on the principal and interest of the loan. 15. Written contract of sale of piece of land at a price of PlM when its book value is P1.5M. The purchaser is the trial court judge in the levy and execution of such land for satisfaction ofjudgment debt. 16. Written contract of sale of laptop at a price of P10,000 entered into by an insane agent, in behalf of his capacitated principal, with a domestic corporation. 17. Oral contract of lease of laptop for a period of 3 years entered into between a demented lessee and an insane lessor, perfected during the lucid interval of the latter. The rental is P500 per month. 18. Oral contract of agency entered into between a minor agent and an adult principal when the commission is P500 9per transaction. Written contract of sale of minor's bag entered into by his Oral contract of lease for 2 years of absentee's bike at a 20rental of P500 per month when prevailing monthly rental is P800 per month entered into by his legal representative with a laminar