Wordpress calculator reading data from spreadsheet page - excel vlookup functionality

I need a wordpress plugin that requires first of all users to sign in so that they are assigned to their login specific page intended for them.

Plugin is more or less a calculator where it reads in data from a spreadsheet that is not accessible by the user. The page where the calculator is shown to the user is protected and code cannot be copied.

The plugin need to have a admin page were it's possible to design templates and user specific sites. There is a need to be able to add new users and change their password and also how long the account is valid. A important tool that must be included is "automatic function feature", where functions for fields can be specified (selected separately) for each field. Needed functions are such as "find lowest value for specified input", "multiply with other field/-s (select fields)", "add and subtract", "add and subtract %" , another very important lookup function should be "what input value for multiplying (only higher value) to get perhaps lower value for specified input", there should also be a page available for the admin where data is stored in style with a spreadsheet (excel files should also be uploadable to match format and automatically import format, here i need two functions - "overwrite existing" and "add additional data"). Plugin must be user friendly preferably just press the requested functions for each field and refer to them.

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Rif. progetto: #17734486

Info sul progetto