How to solve this

4. (20%) The production quantity data of Renshan Company in February X8 is as follows: Work in progress at the beginning of the Dead (60% completed) 50,000 damaged goods 10,000 Put into production in this period 250,000 Completion and transfer out of the unit 260,000 Ending work in process (90% complete) 30,000 300,000 300,000 The normal damaged products of Renshan Company are 3% of the product units that have passed the inspection, Try to calculate the number of normal damaged products and very danged products when the inspection is 50% 60% and 100% of the completion stage of the processing cost