(Accounting) Can i please get help with the following:

The following transactions occurred in the books of Pay n Pick limited for the month of April 2015: I. Aaaitional nrormation: The stock count at 31 March 2015 revealed that 10000 units at a cost of R1 per unit were on hand. REQUIRED: 5.1 Calculate closing stock at 30 April 2015 using First in First out (FIFO). 5.2 Calculate Cost of sales at 30 April 2015. (5) 5.3 Calculate how much gross profit Pay n pick made in the month of April