How much would i have to have a year/in my account balance to purchase this car?

i want to buy a lexus. I'm thinking of paying approx. $740 a month. What is the annual salary range/current account balance i need?

i live in vancouver bc, in case the rates may be different by location.
Added (1). i don't pay for mortgage/rent, just $700 for child support, and my own things.

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