Add custom migration for the part_supplierpricebreak model

- Copies across existing pricing data
- Yikes

InvenTree/common/models.py

@@ -13,6 +13,7 @@ from django.db import models
 from django.conf import settings
 
 import djmoney.settings
+from djmoney.models.fields import MoneyField
 
 from django.utils.translation import ugettext as _
 from django.core.validators import MinValueValidator, MaxValueValidator
@@ -536,6 +537,15 @@ class PriceBreak(models.Model):
 
     currency = models.ForeignKey(Currency, blank=True, null=True, on_delete=models.SET_NULL)
 
+    price = MoneyField(
+        max_digits=19,
+        decimal_places=4,
+        default_currency='USD',
+        null=True,
+        verbose_name=_('Price'),
+        help_text=_('Unit price at specified quantity'),
+    )
+
     @property
     def symbol(self):
         return self.currency.symbol if self.currency else ''