(a) The current value of the written lease equals the total amount for which that lease obligates the consumer during the period of the lease remaining after its early termination, plus the assistive device dealer's early termination costs and the value of the assistive device at the lease expiration date if the lease sets forth that value, less the assistive device lessor's early termination savings.
(b) A reasonable allowance for use may not exceed the amount obtained by multiplying the total amount for which the written lease obligates the consumer by a fraction, the denominator of which is one thousand four hundred sixty (1,460) and the numerator of which is the number of days that the consumer used the assistive device before first reporting the nonconformity to the manufacturer, assistive device lessor, or assistive device dealer.