Summarize data from columns in multiple sheets to a single datasheet of rows

Hello. I need a macro that will take hours by day (columns) by service (rows) per client (sheet) and summarize the data into one database of rows containing client, service, date, and hours. The "Summary of Charges" should only include service hours > zero. I am attaching a sample file. I have little to no experience with vba so I don't even know where to begin. I can copy code.