What is the combined customer count of the northeast and southeast for the first and second time periods

the first answer is b

the second answer is b

the third answer is c

the fourth answer is b

the last answer is c

i hope i did this in time!

my method of doing these:

avg = 80

80 80 80

-1   +5   -6 = -2

which means you have to cancel the - 2 out and +2 instead

80+2 = 82