The total cost after tax to repair Deborah's computer is represented by 0.07 (4 0h) + 4 0h, where h represents the number of hours it takes to repair Deborah's computer. What part of the expression represents the amount of tax Deborah has to pay? Explain

depending on the national / regional legal provisions in favour of the tax contributor where either the work is provided / the computer was aquired / placed, repaired / the repair company has declared fiscal residency the cost (in hours) could be determined by 0.07 (40h)