Picasso Art School's Operating Activities for the Month of February

Picasso Art School's operating activities for the month of February are summarized in the following transactions: 1.Provided $1,500 of instructional lessons.
2) Received $2,100 cash from students-of which $1,200 is for lessons provided in February,and $900 is for lessons provided in January.
3) Paid January's rental bill of $300.Received February's bill of $450 but did not pay.
Determine Picasso Art School's Net Income for February using the accrual basis of accounting?

A) $1,050
B) $1,800
C) $900
D) $750