Dropdown based on one table passing to other fields using ajax laravel - ajax

Question

I'm having problem with regards to selected dropdown passing fields value to other input.
Basically I have one table (plans) which have id, plan_name, price. So i want to pass price to the other input.
So I expect the output that if I selected one of the choices the price will be on the price input.
blade.php
<div class="control-group">
<label class="control-label">Plan</label>
<div class="controls">
<select name="plan_id" id="plan_id" class="plan" style="width:220px">
<option value="0">Select</option>
#foreach($plans as $plan)
<option value="{{ $plan->id}}" >{{$plan->plan_name}}</option>
#endforeach
</select>
</div>
</div>
<div class="control-group">
<label class="control-label">Price</label>
<div class="controls">
<input class="plan_price" type="number" name="price" id="price">
</div>
</div>
Here is the ajax i tried:
$(document).ready(function(){
$(document).on('change','.plan',function(){
//console.log("hmm its change");
var plan_id=$(this).val();
console.log(plan_id);
$.ajax({
type: 'get';
url:'{!!URL::to('findPrice')!!}',
data:{'id':plan_id},
dataType:'json',
success:function(data){
console.log("price");
console.log(data.price);
a.find('.plan_price').val(data.price);
},error:function(){
}
})
})
});
in my controller I have this function:
I dont know if this is also correct on the where part.
public function findPrice(Request $request){
$p = Plan::select('price')->where('id',$request->id)->first();
return response()->json($p);
}
Route::
Route::get('/findPrice','SubscriptionController#findPrice');