=+b. Cyber Novelties’ director of marketing also estimates that an additional $0.50 per-unit allocation for extra promotion will produce the following sales increases:

60,000 units at an $8 unit selling price, 28,000 units at

$10, 17,000 units at $15, 6,000 units at $20, and 3,500 units at $24. Indicate the feasible range of prices if this proposal is implemented and results in the predicted sales increases.