Can someone help me allocate using the step method? I already have the direct method

Learning Objective 10 Problem 26-6A Check Figure Objective: To compare the direct and step methods of allocating overhead costs Total allocated to Fabricating Department, direct method, Monroe Company presents the following data: $42,120 Department Square Feet Overhead Costs Factory Services $90.000 Tools and Supplies 5.000 27,000 Fabricating 18,000 Assembling 23,000 Finishing 9,000 Directions: Calculate the amounts to be allocated to the three producing departments using (a) the direct method; and (b) the step method, with the Factory Services costs being the first allocated. Where needed, round allocation rates correct to one decimal place