Based on the formula being an IF function that tests total sales for being greater than a certain figure, the formula is =IF(B8>=1000000,B8*0.18,B8*0.10).
If the amount in B8 is more than or equal to 100,000, the if function would be IF(B8>=1000000).
If the amount meets that criteria, then the IF function will multiply it by 18% and if the amount does not meet this criteria, the amount is multiplied by 10% after the third comma.
The complete formula would then be:
=IF(B8>=1000000,B8*0.18,B8*0.10)
Find out more on the IF Function at https://brainly.com/question/25638609.