same type you have admin.py

models.py

from django.db import models

# Create your models here.
class company_list(models.Model):
    company_name=models.TextField()
class company_details(models.Model):
    company_name=models.ForeignKey(company_list)
    phone1=models.IntegerField(max_length=10)
    phone2=models.IntegerField(max_length=10)
    email=models.EmailField()
    major=models.TextField()
class transaction(models.Model):
    choice=(('1','PAID'),('0','UNPAID'))
    trans_id=models.IntegerField()
    company_list=models.ForeignKey(company_list)
    products=models.TextField()
    quantity=models.IntegerField()
    price_1=models.DecimalField(max_digits=10,decimal_places=2)
    transaction_date_time=models.DateTimeField()
    status=models.CharField(max_length=1,choices=choice)
class total_price(models.Model):
    trans_id=models.IntegerField()
    total_price=models.DecimalField(max_digits=10,decimal_places=2)