#include<stdio.h>
	int main()
	{
	 	int locks, stocks, barrels, tlocks, tstocks, tbarrels;
	 	float lprice,sprice,bprice,lsales,ssales,bsales,sales,comm;
	 	lprice=45.0;
	 	sprice=30.0;
	 	bprice=25.0;
	 	tlocks=0;
	 	tstocks=0;
	 	tbarrels=0;
	 	printf("\nenter the number of locks and to exit the loop enter -1 for locks\n"); scanf("%d", &locks);
	 	while(locks!=-1)   {
	 	printf("enter the number of stocks and barrels\n");   scanf("%d%d",&stocks,&barrels);
	 		tlocks=tlocks+locks;
	 		tstocks=tstocks+stocks;
	 		tbarrels=tbarrels+barrels;
	 	printf("\nenter the number of locks and to exit the loop enter -1 for locks\n");   scanf("%d",&locks);
	 	}
	 	printf("\ntotal locks = %d\n",tlocks);
	 	printf("total stocks =%d\n",tstocks);
	 	printf("total barrels = %d \n",tbarrels);

	 	lsales = lprice*tlocks;
	 	ssales=sprice*tstocks;
	 	bsales=bprice*tbarrels;
	 	sales=lsales+ssales+bsales;
	 	printf("\nthe total sales=%f\n",sales);		
	 	if(sales > 1800.0)
	 	{
	 		comm=0.10*1000.0;
	 		comm=comm+0.15*800;
	 		comm=comm+0.20*(sales-1800.0);
   }
	 	else if(sales > 1000)
	 	{
	 		comm =0.10*1000;
	 		comm=comm+0.15*(sales-1000);
 }
	 	else
	 		comm=0.10*sales;
	 	printf("the commission is=%f\n",comm);
	 	return 0;
}