I am still kind of confused about this topic and I want to review it. How do I solve the following?

PROBLEM 4: On January 1, 2020, Dressrosa Co. sold a building, which had a carrying amount of P350,000, receiving a P125,000 down payment and, as additional consideration, a P400,000 noninterest bearing note due on January 1, 2023. There was no established exchange price for the building, and the note had no ready market. The prevailing rate of interest for a note of this type at January 1, 2020, was 10%. The present value of 1 at 10% for three periods is 0.75. What amount of interest income should be included in Dressrosa's 2020 income statement?PROBLEM 5: On January 1, 2020, Kaya Co- sold goods to Mane Co. Mane signed a noninterestbearing note requiring payment of P60,000 annually for seven years. The first payment was made on January 1, 2020. The prevailing interest rate for this type of note on the date of issuance was 10%. (Round-off PV factors to 3 decimal places.) 1. How much sales revenue is recorded in January 2020? 2. How much interest income is recorded in 2020? 3. How much is the carrying amount of the note receivable on December 31, 2021? PROBLEM 6: On July 1, 2020, Wanda Co. sold equipment with a carrying amount of P480000 in exchange for a P600000 noninterestbearing note due January 2, 2023. There was no established exchange price for the equipment. The prevailing rate of interest for a note of this type at July 1, 2020 was 10%- (Round off PV factors to 3 decimal places.) In Wanda's 2020 income statement, what amount should be reported as: 1. Interest income? 2. Gain or (loss) on sale of machinery