How can I get value from another form based on multiple user input values

How can I get value from another form based on multiple user input values

Hi all,

I have 2 forms, Material Cost and Quotation forms.

I would like to fetch selling price from Material Cost, which 4 user inputs need to be matched.
e.g. selling price is based on Material, T, W, L all 4 fields in Material Cost are drop down fields.

Please see screenshot in "Material Cost Form"

Here in Quotation form,
I have 
Material - lookup field
T, W, L - decimal field

Please see screenshot in "Quotation Form"

How can i fetch the selling price?

Thanks in advance
Mien