[Bug]: bonded XOR are calculated incorrectly

[OlgaSamorodnova]

Preconditions

1. User is authorized
2. There are 70+ XOR tokens in his wallet

Steps to reproduce

1. Go to Settings - Invite friends & Earn
2. Tap Start inviting
3. Tap + sign

Actual behavior

Amount of XOR to be bonded is calculated incorrectly (0)

https://github.com/sora-xor/sora-ios/assets/118749608/0ff5276b-c692-4af2-a67a-9698d3668a61

Expected behavior

Calculations work fine

Environment

{"label"=>"Development"}

OS version

No response

Additional context

No response

[Trezeguet1]

Verified on Sora Dev 1.0 (238) for iOS version.