Salanoia purchased PPE on Jan 1, 2020 for $2,161,000. The production teams estimates that the asset will be used for 5 years, after which it can be sold for $173,000. Based on these estimates, what is the book value of this asset at the end of 2020 if the company uses the sum-of-the-year's-digits method for calculating depreciation?

A: $662,667

B: $1,325,333

C: $1,498,333

D: $1,861,333