You can calculate running mileage for a paticular time period or get mileage for each day for the week or month.

Fuel costs - Tracking fleet vehicles with GPS easily prevents excessive idling, speeding and personal vehicle use. It also helps to improve routing and helps the average fleet reduce fuel costs by 11%.
Reduction in labor costs - Monitoring of your drivers helps you vastly decrease employee costs and time card abuse. GPS truck tracking saves an average of $1000 per employee annually!
Increase productivity and profits - GPS vehicle tracking allows companies to add more jobs to each work day. Companies see a 15% increase in work orders completed after implementing GPS tracking systems.
Customer service - Tracking vehicles with a GPS fleet management system allows companies to perform better for their customers.
Safety and security - Our GPS fleet vehicle tracking system allows users to track unsafe driving and personal use of fleet vehicles.
Fleet supervision - GPS vehicle tracking allows managers to keep better control of their drivers’ activities.