What would be the amount of Office Supplies Used at the end of the period on 31st December, 2020 from the following information: Office Supplies available at the beginning OMR 480, Office Supplies purchased during the year is OMR 4,800 and Office Supplies Remaining is OMR 4080. O a. None of these O b. OMR 1,200 O c. OMR 9,360 O d. OMR 5,320