Tableau Software Customer Service Issues

I am attempting to graph savings for each category based on the difference between the original price and the minimum "new" price of parts, multiplied by the quantity. Each category contains unique parts with various "new" prices from different suppliers. My challenge is that if multiple suppliers offer the same "new" price for a part, the graph double counts them. I have been unsuccessful in trying to create a formula to address this issue. I have explored using a set for each category to sum the values for the set like: { FIXED [Category] : [Total Savings] } and WINDOW_SUM, but haven't achieved the desired outcome.

Dear Sir/Madam, I hope you are well. I recently registered for a learner student license and received a mail from the Tableau license team. However, I realized that my license is only valid for 4 months from now. Additionally, I have been unable to access the e-learning platform as I did not receive an access code from the licensing team. I kindly request assistance with obtaining the correct licensing file. I look forward to receiving good service from you. Please note that I registered my account using my University Mail - [redacted] Thank you.

I am currently utilizing a free trial of Tableau to assess its suitability for my needs. I am working on creating a map of the counties in Minnesota with the intention of color-coding them into seven distinct regions. I have inputted the county data along with the regional names and FIPS codes from Excel into my worksheet. Unfortunately, upon generating the map, I have noticed that several county borders, particularly in the northeast corner of Minnesota (known as the Arrowhead region), are missing. Counties such as St. Louis, Lake, and Cook should have visible boundaries, which are currently absent on the map. I am seeking assistance on how to rectify this issue, as the accurate display of county borders is essential for my project. Any guidance on resolving this matter would be greatly appreciated as it impacts my decision on the usefulness of this product for my mapping needs. Thank you - J. deM.