If the total cost of an orange and a pear is $120, and a pear costs $90, an orange costs $120-$90 = $<<120-90=30>>30
Since the difference between the price of an orange and a pear is the price of a banana, a banana is sold at $90-$30 = $<<90-30=60>>60
To buy 200 bananas, you'll pay $60*200 = $<<60*200=12000>>12000
When you twice as many oranges as bananas, you buy 2*200 = <<2*200=400>>400 oranges.
The total cost of buying 400 oranges is 400*30 = $<<400*30=12000>>12000
The total price of buying 200 bananas and twice as many oranges as bananas is $12000+$12000 = $24000
#### 24000