Steve is asked to provide a cost estimate for a redecorating project. How should he proceed? Question 31 options: Add raw materials and labor costs for each activity in the WBS. Check competitor pricing, add the raw materials and labor from the WBS, and then decrease by 10% to be competitive. Take the cost of raw materials and labor for each activity in the WBS. Check previous project files and consider any risks to delivery; then add 10% to account for the company profit. Use the cost of raw materials from a similar project on a house with the same floor plan.