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diff --git a/1208/CH9/EX9.19/Exa19.sce b/1208/CH9/EX9.19/Exa19.sce
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+//Exa 19
+clc;
+clear;
+close;
+// given data :
+ST=60;//in hours
+AT=40;//in hours
+SR=120;//in Rs/Hour
+AR=200;//in Rs/Hour
+SCperunit=6;// in Rs
+StdTime=50;//in hours
+StdYield=1000;//in units
+AY=1200;//in units
+//Labour Cost variance
+LCV=(ST*SR)-(AT*AR)
+//Labour Efficiency variance
+LEV=SR*(ST-AT);// in Rs
+//Labour Rate variance
+LRV=AT*(SR-AR);// in Rs
+//Labour Yield variance
+SY=(StdYield*AT)/StdTime;
+LYV=SCperunit*(AY-SY);
+disp(LCV,"Labour Cost variance : ")
+disp(LEV,"Labour Efficiency variance : ")
+disp(LRV,"Labour Rate variance : ")
+disp(LYV,"Labour Yield variance : ")
+disp("Negative variances indicate adverse value   ");
+disp("Positive variances indicate favourable value   ");
+\ No newline at end of file