add #supcharg to bulk upload

app/services/bulk_upload/lettings/row_parser.rb

@@ -321,6 +321,7 @@ private
 
       period: %i[field_79],
       brent: %i[field_80],
+      supcharg: %i[field_83],
       tcharge: %i[field_84],
       chcharge: %i[field_85],
       household_charge: %i[field_86],
@@ -514,6 +515,7 @@ private
 
     attributes["period"] = field_79
     attributes["brent"] = field_80
+    attributes["supcharg"] = field_83
     attributes["tcharge"] = field_84
     attributes["chcharge"] = field_85
     attributes["household_charge"] = field_86

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -597,5 +597,13 @@ RSpec.describe BulkUpload::Lettings::RowParser do
         expect(parser.log.tcharge).to eq(123.45)
       end
     end
+
+    describe "#supcharg" do
+      let(:attributes) { { bulk_upload:, field_83: "123.45" } }
+
+      it "sets value given" do
+        expect(parser.log.supcharg).to eq(123.45)
+      end
+    end
   end
 end