user: Question: What is the total engine capacity of the a4 transmission, which has an urban mpg-US greater than 19, an mpg-us extra-urban greater than 38.6, and an aveo model?
Columns: ['Manufacturer', 'Model', 'Transmission', 'Engine Capacity', 'Fuel Type', 'L/100km Urban (Cold)', 'L/100km Extra-Urban', 'L/100km Combined', 'mpg-UK Urban (Cold)', 'mpg-UK Extra-Urban', 'mpg-UK Combined', 'mpg-US Urban', 'mpg-US Extra-Urban', 'mpg-US Combined', 'CO 2 g/km', 'Green Rating']
Types: ['text', 'text', 'text', 'real', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: ['Alfa Romeo', '147', 'M5', 1598.0, 'Petrol', 11.2, 6.4, 8.2, 25.2, 44.1, 34.4, 21.0, 36.7, 28.6, 194.0, 'F']
SQL:

assistant: SELECT SUM("Engine Capacity") FROM "Table" WHERE "Transmission" = 'a4' AND "mpg-US Urban" > 19.0 AND "mpg-US Extra-Urban" > 38.6 AND "Model" = 'aveo';