On March $1,2020,$ Tebow Company purchased a patent for $$170,000$cash.

Although the patent gives legal protection for $21$ years, the patent will be used for only $2$ years.

Assume straight$-$line amortization.

Amortization per unit

Amortization per year $x$ portion of year $=$ Amortization

Journalize a$)$ the purchase of the patent, and b$)$ the amortization expense of the patent as of December $31,$