79.11. For the purposes of section 214.8 of the Act, the indemnity that may be required if a consumer unilaterally cancels an indeterminate-term contract may not exceed the unpaid balance of the sales price of the goods at the time the contract was made less the amount obtained by multiplying 1/48 of that balance by the number of contract months entirely elapsed. The month started at the time of cancellation is deemed to be a month completely elapsed.