On June 12, 2023, Mary sells her old computer system for $300, and her old printer for $75. She acquired the computer system and printer on February 18, 2021 for $2,800 and $425 respectively. When the Nguyen's prepared their 2021 tax return, they elected to expense the computer and printer using Section 179. The old computer system and printer were used exclusively in her business. a. You will need to enter the old computer system as assets used in Mary's business in order to properly record the sale of the assets. form 1040