1) Identify the items: Items Variable cost/ fixed cost/ mixed costs/ step cost? A) Advertising and promotional cost OMR 1250 B) Total cost of renting car charge is a lump sum of OMR 200 per month plus OMR 1 for every 10 km OMR 150 C) Jet fuel costs, OMR 75 D) Supervisors' salary in Lulu (a new supervisor is added for every 5 cashiers is employed) E) Car cost and Petrol cost F) Research and development cost OMR 1000