Dose shogun japanese steakhouse food cost alot?

my girlfriend wants to go some place that has really good sushi by 18 and vandyke in michigan and i did some research and i saw the shogun japanese steakhouse and the reviews was really good, now the only thing im worried about is the prices there because i dont wanna take her there and not have enuf money, so can anybody who's been there tell me how much money i would need to bring to get sushi for us or mabie even some of the dinners they have?