import tkinterastk;

class JoesAutomotiveApp$\{$

def $\_\_$init$\_\_($self$=$ master$)$;

self.master $=$ master;

self.master.title$("$Joe$\text{'}$s Automotive"$)$;

self.services $=\{$

"Oil Change": $35\mathrm{.}00,$

"Lube Job": $25\mathrm{.}00,$

"Radiator Flush": $50\mathrm{.}00,$

"Transmission Flush": $120\mathrm{.}00,$

"Inspection": $35\mathrm{.}00,$

"Muffler Replacement": $200\mathrm{.}00,$

"Tire Rotation": $20\mathrm{.}00$

$\}$;

self.total$\_$cost $=0\mathrm{.}0$;

self.labels $=[]$

self.entries $=[]$

for service, cost in self.services.items$()$

label $=$ tk$.$Label$($master$,$ text$=$service$)$

label.grid$($sticky$="$w$")$

entry $=$ tk$.$Entry$($master$)$

entry.grid$($row$=$len$($self$.$labels$),$ column$=1)$

self.labels.append$($label$)$

self.entries.append$($entry$)$

self.calc$\_$button $=$ tk$.$Button$($master$,$ text$=$"Calculate Total", command$=$self.calculate$\_$total$)$

self.calc$\_$button.grid$($row$=$len$($self$.$labels$)+1,$ columnspan$=2)$

self.total$\_$label $=$ tk$.$Label$($master$,$ text$=$"Total: $$0\mathrm{.}00")$

self.total$\_$label.grid$($row$=$len$($self$.$labels$)+2,$ columnspan$=2)$

def calculate$\_$total$($self$)$:

self.total$\_$cost $=0\mathrm{.}0$

for entry in self.entries:

try:

quantity $=$ float$($entry$.$get$())$

self.total$\_$cost $+=$ quantity $*$ self.services$[$self$.$services$[$self$.$entries.index$($entry$)]]$

except ValueError:

pass

self.total$\_$label.config$($text$=$"Total: $$"+$ format$($self$.$total$\_$cost$,"\mathrm{.}2$f$"))$

def main$()$:

root $=$ tk$.$Tk$()$

app $=$ JoesAutomotiveApp$($root$)$

root.mainloop$()$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

main$()$