# Global variables
POS=~/.Point_Of_Sales
POS=POS.txt

export POS

confirm()
{
  echo -en "$@"
  read ans
  ans=`echo $ans | tr '[a-z]' '[A-Z]'`
  if [ "$ans" == "Y" ]; then
    return 0
  else
    return 1
  fi
}

num_lines()
{
  grep -i "$@" $POS|wc -l| awk '{ print $1 }'
}

find_lines()
{
  # Find lines matching $1
  res=-1
  if [ ! -z "$1" ]; then
    grep -i "$@" $POS
    res=$?
  fi
  return $res
}

...
locate_single_item()
{
  echo -en "Item to search for: "
  read search
  n=`num_lines "$search"`
  if [ -z "$n" ]; then
    n=0
  fi
  while [ "${n}" -ne "1" ]; do
    #list_items "$search"
    echo -en "${n} matches found. Please choose a "
    case "$n" in 
      "0") echo "less" ;;
      "*") echo "more" ;;
    esac
    echo "specific search term (q to return to menu): "
    read search
    if [ "$search" == "q" ]; then
      return 0
    fi
    n=`num_lines "$search"`
  done
  return `grep -in $search $POS |cut -d":" -f1`

}

...
summary_items()
{
  #echo "- - - POS Summary Report - - -"
  #echo "---------------------------"
  #echo "Date       Total POS"
  #echo "---------------------------"
  print_dtotal
  #echo "---------------------------"
  #print_gtotal
  #echo "---------------------------"
  #echo -en "Best Selling Product: "
  #print_bestsell
  #echo -en "Product with Highest POS: "
  #print_phighPOS
  #echo -en "Date with Highest POS: "
  print_dtotal | sort -f4| while read z

    do
        echo $z | cut -f4 -d' '
        return 0
    done
  echo
  echo -en "Press Enter to continue..."
  read
}
...