On January 1, 2010 Pak Hartawan owned a 15 ha plot of land on Jalan Rawa Belong No 27 West Jakarta. Pak Hartawan is working with PT Makmur Sentosa Investama as an investor who will build a Mall and office building on the land with a BOT agreement with the following agreement: The building cost is Rp. 150 billion, the building has been completed and can be used on January 1, 2020 for a BOT period of 10 years. Question: 1. How much amortization each year can PT Makmur Sentosa Investama and Pak Hartawan admit? From the above case, PT Makmur Sentosa Investama as an investor in the 8th year adds to the construction at a cost of IDR 50 billion and the building period is extended by 5 years to 15 years. Question: 2. Calculate the amortization of PT Makmur Sentosa Investama for year 8 onwards!