Convert from truss to tovar [Bulgaria]

Unit Definition (truss)
The truss is a traditional weight unit, generally equal to 4 stone or 56 pounds (about 25.4 kilograms). The truss was used primarily for measuring hay. In 1795, Parliament specified that a truss of hay should equal 56 pounds for old hay or 60 pounds (about 27.2 kilograms) for new hay.

Unit Definition (tovar [Bulgaria])
The tovar is a traditional weight unit of Bulgaria, equal to 100 oka; this is roughly 280 pounds or 128 kilograms.