Question: Bonita company had the following transactions during 2020: sales of $4400 on account, collected $2400 for services to be performed in 2021, paid $1640 cash in salaries, purchased airline tickets for $250 in December for a trip to take place in 2021. What is Bonita's 2020 net income using cash base accounting? $4910, $5160, $760, $510?