spreadsheet use

sir what if in exam i am calculating all my values correctly in calculator and just plunging in the number and not using the formula in the spreadsheet (therefore the examiner does not know where the number came from ) but my FINAL answer is correct and all the values of Fixed cost and total contribution are correct but i calculated them in calculator and didn’t use spreadsheet formula but i indicated what these values are like total contribution fixed costs and rankings etc . will i get 0 marks ? my final answer is correct there is no mistake ?