Thank you for the opportunity to help you with your question!
a) The book value of he equipment = Balance of he equipment value - balance of accumulaed depeciaion
= 1,375,000 - 725,000
= $ 650,000
b) The balance in the accumulated depreciation means that the value of the assets decreased that much level and shows the book value after deducting it. It is not a loss value and this is the usage value of the equipment.
Note: Loss of the equipment will arise if you sell the asset less than the book value.
Please let me know if you need any clarification. I'm always happy to answer your questions.