uni level MLM Calculation. i have: User-> HasMany::Users, User-> HasMany::trading , trading-> HasOne::trading_data->balance | Laravel

Question

in this picture all are users.

User::hasMany(User::class, 'ref_by');

User::hasMany(Trading::class);

Trading::hasOne(TradingData::class);

Now i want to sum balance from TradingData for user(B).

Where B hasMany User and They also hasMany Users.