SOFIA (Bulgaria), July 11 (SeeNews) -Â Bulgariaâs Solvay Sodi, a unit of Belgium-based soda ash maker Solvay, said that its consolidated net profit fell to 127.8 million levs ($73.5 million/65.3 million euro) in 2018 from 169.6 million levs the year before, due to a lower sales margin.