Develop application using Knack

I have created two Knack Data Objects by importing two separate csv files. One data object is Customer Information and the other data object is a series of measures taken at customer residences and collected through a mobile forms application. Daily, users need to download data, csv or xls files from the mobile forms database, and upload the data directly into Knack. There needs to be a relationship or lookup between the Customer Data and the Measurements Data. There are two sets of calculations that need to be applied to the Measurements Data: FIRST Calculations - Invoice data. Labor price, Material price, Support Material Price, Sales Tax and Total Cost. Based on the first set of calculations an invoice needs to be generated, available in csv format and printable in pdf format. SECOND Calculations - Payroll data. Labor price, Material Price, and Total cost. An invoice needs to be generated, available in csv format and printable in pdf format. This is a proof of concept project. If successful, I intend to add numerous other forms, data, and functionality. I need to present a demo of this functionality by next Tuesday, so time is very urgent. Thank you.