One plus 9 @42750 after combining different offers

Multiple offers can be combined if phone bought from one plus website which are as follows-

1) There is a coupon from One plus by which you can get 1000 off
2) 10% cashback using Amex platinum or higher variant Amex card which will be 4900 (nearly) after 1000 off
3) 2% cashback using certain websites (which cannot be named here but every true dimer knows of it :p) which will be
4) Amex card reward points, cash equivalent of 245 on platinum travel, can be better depending on variant
So 49999-1000-4899.9-980-245=42874

Edit- 1000 off coupon is for students and teachers, here is the link https://www.google.com/url?sa=t&source=web&rct=...

Pls upvote if you like it.