The following is the actual sales for Manama Company for a particular good:

t Sales 1 18 2 21 3 24 4 30 5 35

The company wants to determine how accurate their forecasting model, so they asked their modeling expert to build a trend model. He found the model to forecast sales can be expressed by the following model: Ft= 5+2.4t

Calculate the amount of error occurred by applying the model is:

Hint: Use MSE (Round your answer to 2 decimal places)