Please show me your calculations

This question has the following TWO paits. Part I IDK Company purchased merchandise on account from DKY Company for $150,000, with terms of 2/10, 1/30. During the discount period, DK returned some merchandise and paid $137,200 as payment in full. IDK uses a perpetual inventory system. Required: Prepare the journal entries that DK Company made to record: (la) the purchase of merchandise. (1b) the return of merchandise. (1c) the payment on account. Debit Credit Transaction (la) Purchase (16) Purchase return (10) Payment Part II Bianchi Company sold merchandise to York Company on account for $73,000 with credit terms of ?/10, n/30. The cost of the merchandise sold was $43,800. During the discount period, York Company returned $3,000 of merchandise and paid its account in full (minus the discount) by remitting $69,300 in cash. Both companies use a perpetual inventory system. Required: Prepare the journal entries that Bianchi Company made to record: (2a) the sale of merchandise. (2b) the return of merchandise. (2c) the collection on account. Debit Credit Transaction (2a) Sale (2b) Sales return (2c) Collection