The commissioner of commerce shall require each licensee to file and maintain in force a corporate surety bond, in a form to be prescribed by, and acceptable to, the commissioner, and in a sum of at least $50,000 plus an additional $5,000 for each $100,000 received by the collection agency from debtors located in Minnesota during the previous calendar year, less commissions earned by the collection agency on those collections for the previous calendar year. The total amount of the bond shall not exceed $100,000. A licensee may deposit cash in and with a depository acceptable to the commissioner in an amount and in the manner prescribed and approved by the commissioner in lieu of a bond.