UOM conversion in PO and req

Hi,

We do not have full inventory installed and are using shared inventory that comes with purchasing. The UOM class conversion have been defined. For example

UOM - EA is base unit for class quantity

UOM - DZ is defined with conversion - 1DZ = 12 EA - class quantity - standard conversion

the requirement is when DZ is used in po or req the conversion shoul take place in the documents

for example

line 1 - qty 10, uom - DZ , price - 1 the expectation is that po amnt should be 120 instead of 10 . This is based from the conversion defined above. is this possible? As per my understanding the on hand qty will show the converted qty. please advise