TP question

[Question]
Cherry Co has two divisions A and B. Division A produces product X and sold exclusively to the external market. Division B produces product Y and it required units of product X to produce Y.

Divisons_____________A___________B
Selling Price—————$37————-$150
Variable cost—————$30————–$65
Cost of X purchased-
from outside supplier———————–$35
Contribution margin——-$7————–$50

Requirement:
1) What would be the minimum transfer price if division A sold 12,000 units of product X where there is no spare capacity?

2) What would be the maximum transfer price?

[Answer 1]
Minimum TP = Variable cost + Opportunity cost
Minimum TP =——–$30——+———$7
Minimum TP = ——-$37

Opportunity cost is the lost contribution that we would have earned by selling the goods to division B and earned $7 contribution but instead we decide to sell it to external market so we compensate lost contribution from the external market by charging them higher.

[Answer 2]
Maximum TP = Lower of: i) Net Marginal Revenue ii) External Buy
Maximum TP = Lower of: i) $85 = (150 – 65) ii) $35
Maximum TP = $35

Is this correct sir?