I see this question was asked before on 18 January 2018 and you addressed it.
I have copied the response for the benefit of others. It reads as follows:
Hi, Thanks for your question. The interest costs in EVA calcs are already deducted by the WACC % charge on the cost of capital so we don’t deduct them again.
We find EVA by taking profit after tax but before interest. The adjustment amount you see in exercise 5 is adding back the tax effect.