t main$()$

int month $=1$;

int sales $=0$;

int totalSales $=0$;

$//$get an unknown number of sales

while $($month $<mtext></mtext><mn>4</mn><mi>)</mi>$

$\{$

cout $$ "First sales amount

to end$)$: $"$;

cin $>>$ sales;

while $($sales $>=0)$

$\{$

totalSales $+=$ totalSales $+$

cout $$ "Next sales amount

number to end$)$: $"$;

cin $>>$ sales;