If they just do a drain and refill it'll take 2 1/2 qts/liters. Filters are up to you. The highest mileage cvt in the fleet(over 500k km/310k miles) has never had a cvt filter replaced. Just fluid changes from the drain plug or the odd drop the pan to get a bit more out. And I thin I pulled and disassembled the valve body once too?
What it should and will cost are two different things...
Mirage videos:
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)