someone explain this to me please

10. 5,000kg of material are input to a process in a period. The normal loss is 10% of input. There is no work-in-progress at the end of each period. The actual output is 4,650kg. Which of the following statement is TRUE? a. Actual output is 150kg more than the expected output (4,650 4,500). There is an abnormal loss of 150kg: b. Actual output is 350kg less than the expected output (4,650 5,000). There is an abnormal loss of 350kg; c. Actual output is 350kg less than the expected output (4,650 5,000). There is an abnormal gain of 350kg; s d. Actual output is 150kg more than the expected output (4,650-4,500). There is an abnormal gain of 150kg