A corporation bought equipment on January 1, 2021. The equipment cost $180,000 and had an estimated salvage value of $30,000. The estimated useful life of the equipment is 6 years. The straight-line method of depreciation is used. The book value of the equipment on January 1, 2023 would be O $125,000 O $130,000. O $150,000. $180.000 O $50,000