ZCO, Ltd., a company located in Botswana, is considering implementation of activity-based costing. ZCO manufactures dishwashers. If ZCO implements the ABC system, which of the following costs would it likely consider to be product level activities? Select all that apply. Select one or more: a. Logo on front of dishwasher b. Focus group to review new features c. Owner's manual for new product d. Owner's manual shipped with dishwasher e. Human resources personnel f. Painting of assembly conveyors