Throughput accounting – Revision mock exam

Good evening,

Please could you explain how to get the answer to this question:

A company makes two products – X and Y – for which the following details are available:
X Y
Selling price $50 $32
Material $10 $6
Direct labour $20 $15
Assembly time 20 mins 15 mins
Maximum demand 1500 units 1000 units
The total assembly time is limited to 600 hours.?
Using throughput accounting, how many units of Y should be produced?

Thank you.
Jelena