Could someone assist. Why is this taking forever?

Marvin is looking to buy a new home. He has applied for a mortgage bond of R 3000000 . He will pay 8% p.a. compound interest compounded monthly which is spread over 25 years. Refer to the table below, an extract of the loan schedule, and answer the following. Fxtract of han cechedrale 2.1.1. Calculate the missing values A and B from the schedule. 2.1.2. Marvin decided to pay an extra R! 000 per month. Name and describe two effects this will have on the bond. No calculations are needed. (4)