IF statment doesn't work!

I have 2 columns with 1 and 0. In the new column I want to create 4 option:

LateStart    LateEnd    Status

0                     0              0
1                     0              1
0                     1              2
1                     1              3

I need to use the IF and AND statment to create the result in the "Status" column. Later I'll use a color condition for all the 4 number options in the Status column.