Were would I start in put the below information into a Payroll Data-flow diagram:

Renee and Pierre work various hours throughout the week and do not have a set schedule. Neither punch a time card; however, they write down the number of hours they work each day. I review the hours they write down at the end of each week to make sure they are reasonable. Since Renee uses her own car to deliver orders and pick up supplies, I reimburse her for mileage on her car. Renee gives me a mileage report each week. I use the rates you gave me to calculate the reimbursement for mileage, and I add the reimbursement to her weekly pay. I pay both Renee and Pierre weekly by company check that I personally write out and sign. I forward the time sheets, reimbursement calculation, and check register to you weekly.