Cake Shop Inventory Management in Python

from tkinter import *
from tkinter import ttk

def print():
    tott = float(totText.get())
    top = Toplevel()
    top.geometry("300x300")

    top.config(bg="white")
    l = Label(top, text='---------RECIEPT----------')
    l.pack()
    l.config(bg="white")
    heading = Label(top, text='\tItem\tPRICE\tQTY\tTOTAL')
    heading.pack()
    heading.config(bg="white")

    for child in listBox.get_children():
        item = (listBox.item(child, 'values')[0])
        price = float(listBox.item(child, 'values')[1])
        qty = float(listBox.item(child, 'values')[2])
        tot = float(listBox.item(child, 'values')[3])
        item1 = Label(top, text=f'{item}\t{price}\t{qty}\t{tot}')
        item1.config(bg="white")
        item1.pack()

    tot = Label(top, text=f'Total\t{tott}')
    tot.config(bg="white")
    tot.pack()


def show():
    tot = 0
    if (var1.get()):


        price = int(e1.get())
        qty = int(e6.get())
        tot = int(price * qty)
        tempList = [['Chocolate Cake', e1.get(), e6.get(), tot]]
        tempList.sort(key=lambda e: e[1], reverse=True)
        for i, (item, price, qty, tot) in enumerate(tempList, start=1):
            listBox.insert("", "end", values=(item, price, qty, tot))

    if (var2.get()):
        price = int(e2.get())
        qty = int(e7.get())
        tot = int(price * qty)
        tempList = [['Red Velvet Cake', e2.get(), e7.get(), tot]]
        tempList.sort(key=lambda e: e[1], reverse=True)
        for i, (item, price, qty, tot) in enumerate(tempList, start=1):
            listBox.insert("", "end", values=(item, price, qty, tot))

    if (var3.get()):
        price = int(e3.get())
        qty = int(e8.get())
        tot = int(price * qty)
        tempList = [['Cup Cake', e3.get(), e8.get(), tot]]
        tempList.sort(key=lambda e: e[1], reverse=True)
        for i, (item, price, qty, tot) in enumerate(tempList, start=1):
            listBox.insert("", "end", values=(item, price, qty, tot))



    sum1 = 0.0
    for child in listBox.get_children():
        sum1 += float(listBox.item(child, 'values')[3])
    totText.set(sum1)


root = Tk()
root.title("Cake Shop Inventory System using Python")
root.geometry("1000x600")
global e1
global e2
global e3
global totText
global balText

totText = StringVar()
balText = IntVar()

Label(root, text="Cake Shop Inventory System using Python", font="arial 22 bold" ,).place(x=5, y=10)

var1 = IntVar()
Checkbutton(root, text="Chocolate Cake", variable=var1).place(x=10, y=50)

var2 = IntVar()
Checkbutton(root, text="Red Velvet Cake", variable=var2).place(x=10, y=80)

var3 = IntVar()
Checkbutton(root, text="Cup Cake", variable=var3).place(x=10, y=110)

e1 = Entry(root)
e1.place(x=140, y=50)

e2 = Entry(root)
e2.place(x=140, y=80)

e3 = Entry(root)
e3.place(x=140, y=110)



e6 = Entry(root)
e6.place(x=300, y=50)

e7 = Entry(root)
e7.place(x=300, y=80)

e8 = Entry(root)
e8.place(x=300, y=110)



tot = Label(root, text="", font="arial 22 bold", textvariable=totText)
tot.place(x=750, y=100)



Button(root, text="Add", command=show, height=3, width=13).place(x=10, y=150)
Button(root, text="Print", command=print, height=3, width=13).place(x=120, y=150)

cols = ('item', 'price', 'qty', 'total')
listBox = ttk.Treeview(root, columns=cols, show='headings')

for col in cols:
    listBox.heading(col, text=col)
    listBox.grid(row=1, column=0, columnspan=2)
    listBox.place(x=10, y=250)


root.mainloop()

i have attached the video link below. which will do this tutorials step by step