The Epson arm of Seiko-Epson Co has signed over exclusive rights to sell and service its printers in Bulgaria to Sofia-based ProSoft: We have been selling their products for two years and a half, but it is now that we got the exclusive rights, after a fourfold increase in sales in the year to March 31, ProSoft marketing director Stanislav Tsonev told Reuters; overall, the Bulgarian computer distribution and service company, had turnover of $14.4m in 1993, up from $10m.