Enter a formula or in sales g5 the calculate the difference between the attendance totals for 2018 and 2017

we will write year in column B and column c respectively

2017 and 2018

then we will add months of year from January to December in the cells range from A2 to A13

then we will choose cell g5 and will write the diffrence formula

g5=attendance of 2018 - attendance of 2017"

we put "=" sign to put an formula in excel

then finally we will use fill handle and drag it from g6 to g12

to copy the difference  formula

look at attached file

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