The ZeroLag Merch Leak

Directions: Study the dual donut charts and the underlying financial constraints provided below to decode the missing variables before attempting any questions.

The Lore:
ZeroLag Studios just leaked the Q3 monetization logs for their roster of four elite streamers: Kai, Duke, Fanum, and Ray. The data tracks their Total Revenue (which includes Twitch subs, ad revenue, brand deals, and merch) and their Merch Revenue exclusively.

The visual below illustrates the percentage distribution of these two revenue pools among the four creators. Some of the slices have been redacted ($x, y, a, b$) to protect the bag.

The Meta (Constraints):
1. The Ecosystem: The absolute Total Merch Revenue generated by all four creators combined is exactly $25\%$ of the absolute Total Revenue generated by the entire group.
2. The Duke Multiplier: Duke's Total Revenue is exactly $10$ times greater than his Merch Revenue.
3. The Ray Residual: The exact dollar amount of Ray's Non-Merch Revenue (Total Revenue minus Merch Revenue) is strictly $\$240,000$.
4. The Merch Rivalry: Kai secured exactly twice as much Merch Revenue as Ray secured.