Pls answer the questions with your detailed explanations, it's much appreciated!

Smith Co has the following transactions: (1) Purchase of goods on credit from T Rader: $450 (2) Return of goods purchased on credit last month to T Rouble: $700 What are the correct ledger entries to record these transactions? 4.4 Mew Ling has the following transactions: (1) Receipt of cash from R Singh in respect of an invoice for goods sold three weeks ago (2) Receipt of cash from S Kalu for cash sales What are the ledger entries required to record the above transactions? Debit cash Credit sales Debit cash Credit sales Credit trade receivables Debit sales Credit cash Debit trade receivables Debit sales Credit cash