Hour rule: You only pay for one crossing per hour. This applies separately for Oslo and Bærum.
Monthly ceiling: You will only be charged for a maximum amount of 60 crossings per month. "Per month" refers to the calendar months, from the first day of the month to the last day of the month.
You can see your crossings on My page. To see if you have been charged for more than 60 crossings in a month, you will need to look at the time period and not the crossings related to the invoice. This is because an invoice may take two or more calendar months.