To calculate the Chi-Square statistic for the data in the contingency table, the sum of all of the calculated differences between the observed and expected values (cells: E14, F14, G14, E16, F16, G16) is computed and compared to the Chi-Square critical value at a p-value of .005 or any p-value of your choice.
Sometimes someone will write the actual Greek letter chi here. But I'll write the x squared here. And let me write it this way. This is our chi-square statistic, but I'm going to write it with a capital X instead of a chi because this is going to have approximately a chi-squared distribution.