"Issues with processing data and clustering operators"

Hi,

I am making a project on Rapidminer for the Kaggle Walmart Customer Trip type prediction but I want to use Clustering Algorithm instead of Prediction to find the maximum and minimum sales based on days and the departments making the maximum and minimum sales. I am using the same data set used in the Kaggle competition.

I am new to data analytics and am trying to understand the operators to reach my result but I am unable to proceed ahead with the process. Please have a look at the process flow in the attachment and help me out by letting me know where am I going wrong.

Dataset: https://www.kaggle.com/c/walmart-recruiting-trip-type-classification/data

Regards,

Naman