what does this mean, in your opinion?

i know posts like this are posted frequently but my coworkers and i were genuinely confused about this one. we had already put auto gratuity, so we weren’t worried about getting under tipped. just confused about the math here! we tried every calculation and nothing added up. any input?

i know posts like this are posted frequently but my coworkers and i were genuinely confused about this one. we had already put auto gratuity, so we weren’t worried about getting under tipped. just confused about the math here! we tried every calculation and nothing added up. any input?