#!/bin/bash -

#title :tax.sh

#description :a tax calculator

#author :Viktor Ahlström

#date :20150627

#version :1.9

#usage :./tax.sh

#notes :

#bash_version :3.2.48(1)-release

#============================================================================

get_tax() {

tax=$1

if [[ $tax =~ ^-?[0-9]+$ ]] ; then echo "OK." ; fi

states=(

AL AK AZ AR

CA CO CT

DE DC

FL

GA

HI

ID IL IN IA

KS KY

LA

ME MD MA MI MN MS MO MT

NE NV NH NJ NM NY NC ND

OH OK OR

PA

RI

SC SD

TN TX

UT

VT VA

WA WV WI WY

)

taxes=(

4 0 5.6 6.5

7.5 2.9 6.35

0 5.75

6

4

4

6 6.25 7 6

6.15 6

4

5.5 6 6.25 6 6.875 7 4.225 0

5.5 6.85 0 7 5.125 4 4.75 5

5.75 4.5 0

6

7

6 4

7 6.25

4.7

6 4.3

6.5 6 5 4

)

for ((i=0; i<=50; i++)) ; do # cycle through all 51 2 letter codes

check=$(echo ${states[$i]}) # set the current check code

if [[ $tax == $check ]] # see if the entered code matches the current check code

then

taxpercent=$(echo ${taxes[$i]}) #set the sales tax percentage

break #break away from the loop to avoid excess checking

fi

done

}

if [[ $# == 2 ]] ; then #see if arguments are present

get_tax $1 $2 #run the function shown above with the args that were present when command was run

subtotal=$2 #set the subtotal to the second command

percent=$(echo "scale=5;$taxpercent * 0.01" | bc) #format the tax percentage to proper value

stax=$(echo "scale=2;$subtotal * $percent" | bc) #multiply the subtotal by the percent and store in a variable for later

grandtotal=$(echo "$stax + $subtotal" | bc) #add the tax figured out in the line before to the subtotal

#number formatting=====================================================================###

#

staxdec=$(echo $stax | sed 's/:*.//') #

if [[ ${#staxdec} == 4 ]] ; then grandtotal=${grandtotal%?} ; fi #

if [[ ${#staxdec} == 5 ]] ; then grandtotal=${grandtotal%??} ; fi #

if [[ ${#staxdec} == 4 ]] ; then stax=${stax%?} ; fi #

if [[ ${#staxdec} == 5 ]] ; then stax=${stax%??} ; fi #

if [[ ${#stax} == 4 ]] ; then grandtotal=${grandtotal%?} ; fi #

if [[ ${#stax} == 5 ]] ; then grandtotal=${grandtotal%??} ; fi #

if [[ ${#stax} == 4 ]] ; then stax=${stax%?} ; fi #

if [[ ${#stax} == 5 ]] ; then stax=${stax%??} ; fi #

if [[ $stax < 1 ]] ; then #

stax=$(echo -ne "0" ; echo -ne $stax) #

else #

stax=$stax #

fi #

#

#======================================================================================###

echo -e "###########################"

echo -e "SUBTOTAL \$$subtotal "

echo -e "SALES TAX % $taxpercent% "

echo -e "SALES TAX \$$stax "

echo "###########################"

echo -e "GRAND TOTAL \$$grandtotal"

else #run on an invalid input

echo "Usage: tax.sh <[state] [tax percent]> <subtotal>"

fi