Simplify the following text for a Grade 15 native English-speaking person.
Original: In the original and simplified sense , commodities were things of value , of uniform quality , that were produced in large quantities by many different producers ; the items from each different producer were considered equivalent .
Simplified: In the original and simplified sense , commodities were things of value , of uniform quality , that were produced in large quantities by many different producers ; the items from each different producer are considered as of the same value .