In Module 2 we studied customers and vendors. In this assignment, you will assume the role of the business owner of Kristin Raina Interior Designs responding to a complaint about billing practices. Below is the message you received from a customer; your assignment is to write a professional business letter that will serve as the cover letter for an updated invoice. After the letter, please write a short summary of internal control practices that should be in place to avoid this type of accounting error. Make sure to discuss how this error could be avoided in the future (note: an updated invoice is not required for this assignment only the business letter):

Hello Ms. Raina, 

I don’t know what is going on with your company. I just received a bill for 16 hours of design services and 8 hours of decorating services, I was charged $75 for both, we had agreed on a price of $60 per hour for design services and $50 per hour for decorating services, as my neighbor Jennie Gunthrie received the same deal.

I am not paying this bill, in fact I already put down a $600 payment, which isn’t reflected on this invoice at all? What is going on? I need to be compensated for all of my time and if this isn’t cleared up and a new bill sent out immediately, I will never use your services and would not recommend your services to anyone.


Maria Omari

Information to help create letter:

Business Company Address:

Kristin Raina

Kristin Raina Interior Designs

25 NE Johnson Street

Minneapolis, MN 53402

Customer Company Address: 

Maria Omari

210 NE Lowry Ave.

Minneapolis, MN 54204

Submit your completed assignment by following the directions linked below. Please check the Course Calendar for specific due dates.

Save your assignment as a Microsoft Word document. (Mac users, please remember to append the “.docx” extension to the filename.) The name of the file should be your first initial and last name, followed by an underscore and the name of the assignment, and an underscore and the date. An example is shown below:


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