Rafael sold an asset to Jamal. What is Rafael's amount realized on the sale in each of the following alternative scenarios?
a. Rafael received $80,000 of cash and a vehicle worth $10,000. Rafael also pays $5,000 in selling expenses.
b. Rafael received $80,000 of cash and was relieved of a $30,000 mortgage on the asset he sold to Jamal. Rafael also paid a commission of $5,000 on the transaction.
c. Rafael received $20,000 of cash, a parcel of land worth $50,000, and marketable securities of $10,000. Rafael also paid a commission of $8,000 on the transaction.