Build a Formidable Forms add-on plugin to count words and calculate price for text-files

Hello, I am looking for a custom plugin for Formidable Forms that does the following: Create a contact form on my wordpress based site that: - allows users to upload one or multiple textfiles in one go (at least .txt, .doc, .docx, .pdf, .rtf) - automatically calculate and show a word count for all uploaded files total - Use this word count to automatically calculate a price based on that word count using Formidable Forms field calculations and a fixed price per word This should result in displaying an already checked checkbox with the price per word and the total price. Using formidable forms: There should be a second optional checkbox underneath the first checkbox with an additional price per word for 1 additional service. If checked there is an additional price per word for the total word count. There should be 3 options customers can choose 1 from. These should show the speed with which the text should be corrected: within 1 day, within 3 days, within 7 days. If a user checks within 7 days, there is no price change. Within 3 days a certain multiplier (example 1,2x) applies. Within 1 day, another multiplier applies.