Cost per Mbps is calculated using monthly costs, dividing the total monthly cost of Internet Access connections by the total bandwidth capacity reported for those connections. Annual non-recurring costs are allocated across the total contract months to take into account the total cost of the service, in cases where zero monthly cost was reported.
Backbone costs that are shared across school districts have been included where those costs have been allocated. The ratio provides the share of the cost allocated to the school district out of the total amount of the backbone costs.
In analyses where the average cost per Mbps is calculated across multiple line items, the total cost across all line items is divided by the total bandwidth purchased, resulting in a weighted average cost for that group of line items.