* Company H purchased a deferred device. The seller recommends the following payment methods * method 1: payment of 6 installments, 1 year apart, 1st installment 3 years after receiving the device, monthly payment 180 * method 2: payment payment 8 installments, 1 year apart, 1st installment 1 year after receiving equipment, first 4 installments of 100 or more each, last 4 payments 150 or more * Method 3: 3 payments: Phase 1: payment of 300 million dong, 2 years after receiving equipment; Term 2: pay 200 or more, 2 years after term 1; Term 3: pay 500 or more, 3 years after Account 2 • Deferred interest rate 10% / year * Please help the company choose the optimal payment plan