Form calculation with combo box field

[danielw42205661]

Referring to the screenshot below, in my form I have simplified field notation on the last column field that multiplies the qty by the price per unit and adds 10%. There is also a warranty combo box field that has 2 options. If someone selects an option e.g "+2yrs", I then need to add $9,999 to the total field as well, which I can't figure out how to do. A different number needs to be added if "+4yrs" is selected as well.

If someone could help me out and explain how this would be done that would be grearly appreciated. Thank you. 

[Nesa Nurani · Accepted solution]

Give choices in dropdown export value to be price you want, for example give "+2yrs" export value to be 9999 same for "+4yrs" just instead of 9999 put the value you wish for that choice, if you have default choice give it export value 0.

Now in simplified field notation, just add dropdown field name:  (qty1*Pex1)*1.1+warranty

[danielw42205661]

Thanks so much @Nesa Nurani!