**Glasspoint**explanation is in the fille

**Marvih**You can use

**Form Calculation**widget for your calculations.Please check this guide https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget

"Now he wants sides finished" You can have Single Choice properties for

**Yes/No**and assign a calculation value if the user selects**Yes.**

https://www.jotform.com/help/301-How-to-Assign-Calculation-ValueDoor handle/accessories can be in a

**Short Text Entry**if they have the option of how many they can buyUnfortunately I am not able to see the whole calculation of the Excel Spreadsheet to see the prices under those column.