The Following Transactions Occurred During July

The following transactions occurred during July:
Received $900 cash for services provided to a customer during July.
Received $2,200 cash investment from Barbara Hanson,the owner of the business.
Received $750 from a customer in partial payment of his account receivable,which arose from sales in June.
Provided services to a customer on credit,$375.
Signed a promissory note for a $6,000 bank loan.
Received $1,250 cash from a customer for services to be rendered next year.
What was the amount of revenue for July?

A) $900
B) $1,275
C) $2,525
D) $3,275
E) $11,100