An electronics store has 4 branches in a large city. They are curious if sales in any particular department are different depending on location. They take a random sample of 4 purchases throughout the 4 branches - the results are recorded below. Run an independence test for the data below at the 0.05 level of significance.

Appliances. TV. Computers Cell Phones

Branch 1 56 28 63 24

Branch 2 44 22 55 27

Branch 3 53 17 49 33

Branch 4 51 31 66 29

Enter the test statistic - round to 4 decimal places.