The Company has a balance in Class 13 that relates to a single lease that commenced on January 1, 2018. The lease has an initial term of 7, with two successive options to renew for 3 years each. Expenditures on this leasehold were $51,000 in 2018 and $28,000 in 2019. There were no further expenditures in 2020. The write-off of these expenditures for accounting purposes is included in Amortization Expense.