Regarding the claim, SandStorm is worth 48 GP rather than 49. The spending looks all right, your numbers are just a tad off because you didn't account for your new claim.
Base GP: 2,850 Earned GP: 1,068 Total GP: 3,918 total spent on Stats: 2,400 total spent on skills: 1,450 Banked GP: 97
This is approved!
To answer your questions: 1) To calculate your new base GP, we add the base GP to your grade GP, divide that in half and then add your base. You can see this being done for Ginjiro's claim too. 2) Levi's app grade is not subtracted from Gin's death GP, Ginjiro's application grade is. Death GP does not include the application GP.
Firstly, should you choose to begin an adventure with a brand new character you will be able to transfer 30% of the deceased character’s Total GP (not counting the GP from their original application) to a new one on top of the value of the application. If this character is connected to the deceased character—if they are resurrected or reborn in some way—this value increases to 40%. The new character's Base GP is determined by adding the application GP to half of what was transferred.
Seireitei is crumbling and the Gotei is a shell of its former self. Ravaged by the plague, the surviving Shinigami struggle to maintain the balance, but with so few of them left, the work is taxing and their fortress-city has fallen to neglect. Spread thin across all fronts, their diminished presence has been noted by friend and foe alike.
The Arrancar have rebuilt Las Noches and are rallying. The throne remains empty, but self-styled Espada have risen up from among them and are vying for control, each one endlessly testing the others’ weaknesses. Too evenly matched for any one of them to claim the crown, they bide their time, waiting for the opportune moment.
On Earth, all seems well—but there is a war being fought in the shadows as the mortals find themselves lacking the protection they once had and so sorely need. The Quincy, having realized the oppressive specter of the Shinigami is no more, are flourishing, and are fighting the Hollow-breeds with renewed vigor.