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**DumbGenius** my teacher gave me this but i feel that there isnt enough information, though she says its do-able. extra credit for my almost failing math grade. so please help me

Mike and Tony, went shopping for floor tiles at a tile shop the other day. The floor tiles were on sale for only $28 each.

However, they got it in her head that, the total amount of dollars they must spend must be a number where all of the digits are the same.

With that in mind, what is the minimum number of tiles she must buy?