Regent Plumbing Company provides plumbing services. Selected transactions of Regent Plumbing Company are described as follows:

a$)$ Received $$9,000$ cash from the owner Sharon Regent, as capital.

b$)$ Paid $$4,000$ cash for equipment to be used for plumbing repairs.

c$)$ Borrowed $$9,000$ from a local bank and deposited the money in the checking account.

d$)$ Paid $$700$ rent for the year.

e$)$ Paid $$400$ cash for plumbing supplies to be used next year.

f$)$ Completed a plumbing repair project for a local lawyer and received $$6,000$ cash.

Calculate the net income. Assume plumbing supplies of $$400$ are left at the end of the accounting period.

A$.$ $$5,300$

B$.$ $$5,600$

C$.$ $$300$

D$.$ $$6,000$