I need help with a few transactions:

1. Sold merchandise on credit for $2,480 plus sales tax of $124 to Dimitri Sayegh, Sale slip 241.

2. Accepted a return of merchandise from Dimitri Sayegh. The merchandise was originally sold on Sale slip 241, dated Oct 3: issued Credit Memorandum 18 for $630, which includes sales tax of $30.

3. Received Credit Memorandum 175 for $430 from Classy Threads Inc. for defective goods that were returned. The original purchase was recorded on October 25.

4. Recorded the October payroll; earnings $10800, social security $702, Medicare $162, income tax $1,020, net pay $8,916. The excess withholdings corrected an error made in withholdings in September.

My question is does all this transactions goes on general journal and how do you post them.