How to make particular rows/cells bold in the results table of custom SQL queries?

I have started writing SQL queries inside SAP B1 but I still cannot figure how to format some rows in the result set and make them bold. For example:

Customer1 <-- BOLD

                     10

                     10

                     10

                     30 <-- BOLD

Customer2 <-- BOLD   20

                     20

                     40 <-- BOLD

Any help would be highly appreciated, thanks.