Q.4 Application of Activity-Based Costing Nina Audrey started Nina Interiors, a niche furniture brand. 10 years ago. She ran the business as a sole proprietorship. While she has 50 skilled carpenters and 5 sales people on her payroll, she has been taking care of the accounting by herself. Now, she intends to offer 40% of the ownership to public in next couple years and is willing to make changes and has hired Tracy as a management accountant to organize and improve the accounting systems.