How much in total does customer with first name as Carole and last name as Bernhard paid?
return customers ;return #1 with  first name Carole ;return #1 with  last name Bernhard ;return #1 in both #2 and #3 ;return how much #4 has paid ;return the  sum of #5
['select', 'filter', 'filter', 'intersection', 'project', 'aggregate']