Driver Utilization Chart

I would like to build a chart that i can put delivery times in and the amount of time it took and the chart would depict the time the driver would need to leave to make the delivery time using a gnat chart with drivers as blocks on the chart. In the chart that I attached I would like to be able to put in the start date, add the miles divided by 53 and use the time calculated to show when the driver would arrive as the appointment time. I would like for the data to be depicted by the orange bar on the chart. Instead of having full months i would need for the chart to be full weeks so Sunday - Saturday.