Kanona Limited sells one product for which data is given below: N$ per unit Selling price 10 Variable cost 6 Fixed cost 2 The fixed costs are based on a budgeted level of activity of 5 000 units for the period. If the selling price and variable cost increase by 20% and 12% respectively by how much must sales volume change compared with the original budgeted level in order to achieve the original profit for the period? Select one: O a. 24.2% decrease O b. None of all O c. 39.4% decrease O d. 39.4% increase e. 24.2% increase