On 1 January 2021, the inventory of shirts on hand at Silly Seasons comprised of 20 (Twenty) shirts with a total value of $270.00. Each shirt is sold for $25. Details of its purchases and sales during 2021 were:

Required: a) Calculate the value of ending inventory using the perpetual average method (round to 2 decimal places). b) Calculate the value of ending inventory using periodic FIFO. c) Calculate the value of ending inventory using periodic AVCO (round to 2 decimal places). d) Calculate the gross profit under each method

Dates Sales in Units Purchases 20 @ $14.00 15 10 @ $14.00 6 10 January 28 February 4 April 8 May 2 June 20 July 22 September 11 October 12 @ $14.30 1 14 20 @ $15.10 18 15 October 14 @ $15.20 21 October 20