. Shad Enterprises had the following transactions during 2019 Made sales of $8,000 to customers on account Collected $2,000 from customers for services to be performed 2020 Paid $2,500 for salaries earned in 2019 Purchased $2,000 in supplies of which $500 remained on hand at year end. Using accrual accounting concepts of revenue and expense recognition, what is Shad's 2019 net income? O A $7,500 B. $3,500 OC $4,000 OD.$6,000