I've read a little about car pricing, and it is very mysterious. For example, the "dealer invoice" is what they pay . . . BUT, they get various rebates and incentives from the dealers based on sales, promotions and such, so they can make a profit even selling below invoice some times.
My family bought a truck new in 2005 that cost nearly $40 000. A few years later the same truck was selling for much less. I expect supply/demand is more relevant than cost of production.
Another dealer told me (about his competition, when I told them they quoted me $3000 less on a similar vehicle) "there is no way you can get that car for that price. If you can, buy it, but I expect when you get in the finance office you will see where you are going to be paying back the difference."
As to the Mirage, it is made overseas, likely highly automated, large volume, and lower material cost (it is several hundred pounds less car than most), so I expect it could be made for less. Also, at least in Canada, the delivery fee is the same as vehicles that are twice the length and weight.
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View my fuel log 2014 Mirage SE 1.2 manual: 45.0 mpg (US) ... 19.1 km/L ... 5.2 L/100 km ... 54.1 mpg (Imp)