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BTW, what were the main difficulties/problems in implementing your project using spreadsheets?

I assume that one of these was having to write Ruby scripts to connect things together instead of working directly with your data sources, was there anything else?

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I have never had the need to do anything particularly complicated in Excel before, and had to learn how to express things that would have been very easy for me in Ruby, like "Servers, domain names, telephone bills, Twilio credits, and the like count as 通信費. Sum the total of all 通信費 given a list of all of your expenses for the past year."

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