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If they'd said "it's estimated to cost 1.5 million euros", they'd have added "(1.7 million dollars)". But since they didn't have a specific value, they just used the units.
If you were assuming that I'm European for some dumb reason, then rest assured I'm not worried about this passing thought on the writing style of a publication I never read.
Thank you for your concern, but I will be alright.