Code:#include<stdio.h> #incude<conio.h> main() { char sel,sels,selss,selsss; int sub=0,n=0,total=0; printf("\n 1. Grocery List \n 2. Modify Grocery List \n 3. Total"); scanf("%c",&sel); if(sel=='1') { printf("\n1. Cake \n2. Rice \n3. Sugar \n4. Liquor \n5. Weed \n6. Smoke \n7. Total \n"); scanf("%c", &sels); do { if(sels=='1') sub=sub+10; else if(sels=='2') sub=sub+20; else if(sels=='3') sub=sub+20; else if(sels=='4') sub=sub+40; else if(sels=='5') sub=sub+100; else if(sels=='6') sub=sub+100; else if(sels=='7') { printf("\n Thank You :-) "); total=sub; n=1; } }while(n==0); } else if(sel=='2') { printf("\n 1. Add Item \n 2. Drop Item"); scanf("%c",&selss); if(selss=='1') { printf("\n Select the Item to Add"); printf("\n1. Cake \n2. Rice \n3. Sugar \n4. Liquor \n5. Weed \n6. Smoke \n7. Total \n"); scanf("%c", &sels); do { if(sels=='1') sub=sub+10; else if(sels=='2') sub=sub+20; else if(sels=='3') sub=sub+20; else if(sels=='4') sub=sub+40; else if(sels=='5') sub=sub+100; else if(sels=='6') sub=sub+100; else if(sels=='7') { printf("\n Thank You :-) "); total=sub; n=1; } }while(n==0); else if(selss=='2') { printf("\n Select the Item to Drop"); printf("\n1. Cake \n2. Rice \n3. Sugar \n4. Liquor \n5. Weed \n6. Smoke \n7. Total \n"); scanf("%c", &sels); do { if(sels=='1') sub=sub-10; else if(sels=='2') sub=sub-20; else if(sels=='3') sub=sub-20; else if(sels=='4') sub=sub-40; else if(sels=='5') sub=sub-100; else if(sels=='6') sub=sub-100; else if(sels=='7') { printf("\n Thank You :-) "); total=sub; n=1; } }while(n==0); } else if(sel=='3'); { printf("\n The Total is : $ %d",&total); printf("\n ThankYou !!! for shopping here :] "); } }