Contact person: Interactive ROI Calculator for WordPress

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Location: Miami, United States

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I have an ROI model already working inside Excel and now need it transformed into an elegant, responsive experience I can drop straight into my WordPress site. The flow is simple: visitors type in data about their operation, click “Calculate,” instantly see the ROI numbers plotted on a clean line graph, then complete a short contact form to unlock a branded PDF summary. When they press “Submit,” two things must happen every time—an email with the PDF lands in their inbox and an exact copy is forwarded to my sales team.

Your job is to translate the existing spreadsheet logic into well-structured code (PHP/JavaScript is fine), build the line-graph visualisation, generate the downloadable PDF, wire in the dual-email notification, and package it so I can embed it on any page via shortcode or Gutenberg block. The interface should feel modern, fast, and fully responsive.

Deliverables
• WordPress-ready plugin or embed snippet that reproduces the Excel calculations with absolute accuracy
• Interactive line graph ([login to view URL], Highcharts or similar) styled to match our site palette
• Auto-generated PDF reflecting the user’s inputs and graph
• Contact form with field validation and double email dispatch (user + sales)
• Clear install notes and a quick guide so my team can tweak labels or formulas later

Everything has to work seamlessly without external dependencies that could break on updates, and performance must remain strong even on mobile. Let me know which libraries you prefer and any past examples of similar calculators you’ve shipped." (client-provided description)