Aggregated metric by ranked dimension

[peerae92]

Hi Guys 

I am looking to aggregate a metric by a ranked dimension by i'm getting some errors:

Make	Model	Price
Ford	Focus	$5,000
Ford	Mondeo	$8,000
Peugeot	206	$2,000
Peugeot	106	$5,000
Toyota	Yaris	$4,000
Toyota	Camry	$12,000
Toyota	Premio	$8,000
Honda	Civic	$2,500
Honda	hr-v	$4,000

Above is a test example. I want to find the top 2 'Make' based on the highest price (in this case Ford = $13,000 and Toyota = $24,000). Then based on them, I want to count how many models there are (in this case Ford = 2 and Toyota = 3). 

The final output I want is just the metric 5 (2+3). I have used lots of different combinations of aggr, rank, variables etc but cannot get it to work without pulling in the 'model' dimension as a table. 

Any help of how to do this so that I can just display 5 as a metric would be much appreciated. 

Thanks

[tresB]

=Count(  Aggr( NODISTINCT if(rank(Sum(Price))<3, Make), Make) )