Sharon Smith is sales manager of the KleenUp Company. Sharon intends to launch a monthly sales campaign during the coming year. She is currently preparing a budget for the labour costs required to handle the sales campaigns and has estimated that the first one will require 100 hours at a cost of £15 per hour. From previous experience, Sharon knows that the salesforce’s learning experience follows a 78% learning curve. The KleenUp Company would like to know what the first four campaigns will cost.