100hrs20days.sh

#!/bin/bash -x

# constants
EMP_RATE_PER_HR=20
IS_FULLTIME=1
IS_PARTTIME=2
NUM_OF_WORKING_DAYS=20
MAX_HRS_IN_MONTH=100

# variables
totalEmpHrs=0
totalWorkingDays=0

while [[ $totalEmpHrs -lt $MAX_HRS_IN_MONTH && $totalWorkingDays -lt $NUM_OF_WORKING_DAYS ]]
do
        ((totalWorkingDays++))
        empCheck=$((RANDOM%3))
        case "$empCheck" in
                $IS_FULLTIME)
                        empHrs=8
                ;;
                $IS_PARTTIME)
                        empHrs=4
                ;;
                *)
                        empHrs=0
                ;;
        esac
totalEmpHrs=$(($totalEmpHrs+$empHrs))
done
Salary=$(($totalEmpHrs*$EMP_RATE_PER_HR))