PROBABILITIES PROBLEM

Job ID: 32427794

Budget: $10 – $30 AUD

BOSS!!!
I DO NOT FIND AN ANSWER ANYWHERE!!!!!

If I have to pay $50 to open a box, and in the box you find 3 dinosaurs of different rarities (R1, R2, R3), and there are 1000 total boxes, what is the price of 1 R1?

BOX PRICE = $50
TOTAL BOXES = 1000
PROBABILITY OF R1 = 10%
PROBABILITY OF R2 = 30%
PROBABILITY OF R1 = 60%

WHAT IS VALUE OF 1 DINOSAUR R2?

Hope you can help me out here... Thanks