#/bin/bash
clear
transaction=0
sales=0
total=0
MIN=0
MAX=0
while true
do
    echo -e "Enter sales price: \c"
    read sales
    $((sales)) || break # if sales = 0 then finish
    [ $sales -gt $MAX ] && MAX=$sales
    [ $transaction -eq 0 ] || [ $sales -lt $MIN ] && MIN=$sales
    $((transaction++))
    $((total+=sales))
done
echo "Number of Transactions : $transaction"
echo "Total Sales : $total"
echo "Max amount : $MAX"
echo "Min amount : $MIN"
echo "Average : $((total/transaction))"
[ $total -lt 100 ] && echo " Sorry, we do not take credit cards for sales less than $100."