Shoulder roast, half, bone in, ranges from 1.75 lbs to 2.5 lbs.  Typical  cost per half shoulder roast, $17.50 to $25.00 cdn.   Product cut fresh  and quick frozen.   This cut is good cooked as a low slow roast or used as the base for lamb stew.  Preparation ideas can be found in "recipes" 

Shoulder Roast, half, bone in, per lb