Answer: Hello your question has some missing details hence I will provide an answer based on the general scope of your question
answer ; =([Cost] * 1.07)
Explanation:
Assuming the table heading for estimated cost in July 2014 is named "Cost"
Total estimated cost
Total = Cost * ( 1 + Sales Tax )
= Cost * ( 1 + 0.07 )
= Cost * 1.07
Excel equivalent formula used that can be used = ([Cost] * 1.07)
