I am stuggling with these 2 qeustions, please plase help me. Thank you.

Problem 1: Four Company reported inventory on December 31, 2015 of 3,000 units of cost of $150,000. The following transactions occurred during January 2016: Four Company used a periodic, FIFO inventory system and the gross method to account for purchase discounts and sales discounts Required: Prepare the journal entry for each date. If no entry is required, state "No Entry. Jan 3: Purchased 200 units on account for $10,000. Terms of the purchase were 2/10, n30 F.O.B shipping point Jan 7: Received the inventory purchased on January 3. Jan 8: Sold 800 units on account for $60,000. Terms of the sale were F.O.B. destination: there were no sales discounts. Jan 11: Paid for the inventory purchased on January 3 Jan 14: The goods sold on January 8 arrived at the customer's warehouse Jan 15: Purchased 400 units on account for $20,000. Terms of the sale were 2/10. n30: F.O.B. destination Jan 18: Received the inventory purchased on January 15. Jan 30. Paid for the inventory purchased on January 15