Alex is tilting his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $3.15 per square foot. how much will alex play to his tile entryway?

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The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.