Question 7 - Answer

              Mdm Sim wrapped 5 + Mdm Li Wrapped 6 = 11
             
              3300/11 = 300

              5 x 300 = 1500

             (a) Mdm Sim wrapped 1500 dumplings.

              1500 x 0.2 = 300 (Each dumpling earn 20 cents)

              1500/40 = 37.50 ( units of every 40 dumplings)

               37 x 2.50 = 92.50 ( Earned extra for every 40 dumplings)

               300 + 92.50 = 392.50 ( Total earned)

               (b) Mdm Sim earned $392.50