12. Cisco Limited applies linear programming in solving limiting resources decisions. The company makes use of material Beta that is sourced from the local market at a price of N$0.80 per kg. The company's objective function in linear programming is to maximise profit. The shadow price of material Beta is N$2 per kg. The following statement(s) is/are correct: (i) Contribution will be increased by N$2 for each additional kg of material Beta purchased at N$0.80 per kg (ii) The maximum price which should be paid for an additional kg of material Beta is N$2 (iii) Contribution will be increased by N$1.20 for each additional kg of material Beta purchased at N$0.80 (iv) The maximum price which should be paid for an additional kg of material Beta is N$2.80 a. (i) only C b. (ii) only C None of all C d. (ii) and (iii) C e. (i) and (iv)