Answer:
The correct option is (c) 13.277.
Step-by-step explanation:
The observed data is:
Location Observed sales (units)
Northside 70
Pleasant Township 75
Southwick 70
I-90 50
Venice Avenue 35
TOTAL 300
The test statistic for the Goodness of fit test is:

For k independent samples this test statistic follows a Chi-square distribution with degrees of freedom (k - 1).
The sample size in this case is, k = 5.
The degrees of freedom is, (k - 1) = 4.
The level of significance is, α = 0.01.
The critical value of the test is:

**Use the Chi-square table.
Thus, the critical value is 13.277.