Impairment testing for property and equipment: On December 31, 2018, Avery Inc. has equipment with a book (acquisition cost less accumulated depreciation) value of $450,000. On that same date, Avery determines that the undiscounted future cash flows expected from this equipment are estimated to be $350,000 and the market value of the equipment is $100,000. What is the amount of write-down required, if any?

A. No writedown is required

B. ($350,000)

C. ($100,000)

D. ($250,000)