Final answer:
The monthly depreciation expense for the purchased office equipment with a cost of $54,000 over a useful life of 10 years and no residual value is $450.
Step-by-step explanation:
To calculate the depreciation expense per month for the furniture purchased by Smart Touch Learning, we use the straight-line method of depreciation. The total cost of the furniture is $54,000, with a useful life of 10 years, and no residual value. The annual depreciation expense is then the cost divided by the useful life. Therefore, the annual depreciation would be $54,000 ÷ 10 = $5,400 per year. To find the monthly depreciation expense, divide the annual depreciation by 12 months.
$5,400 ÷ 12 = $450 per month.
Therefore, the correct answer is (d) $450.