Calculate gross profit under periodic system used FIFO. 

the following onformation for Dar company: 1/1/2023 begining 100 @3.7 5/01/2023 purchased 200@3.5 07/01/2023 sold 8/01/2023 sold returns 20@7 12/01/2023 purchase 300@4.5 14/01/2023 purchase return 30@4.5 18/01/2023 sold 50@10 22/01/2023 purchased 250@5 300@10 30@4 gross profit under periodic system used FIFO 25/01/2023 sold 31/01/2023 purchased 250 @7