Meng Wee's credit

Here's a short riddle for everyone:

Yesterday, Wen Zhi said he has phone credits worth $5.00. Meng Wee then said he has 10 times more than Wen Zhi. How much phone credits does Meng Wee have? Let me answer this for you: $55.00.

Today, Wen Zhi said he has phone credits worth -$5.00 (negative five dollars). Meng Wee then said he has 10 times more than Wen Zhi. How much phone credits does Meng Wee have? Answer this yourself.

(The answer is not -$55.00. As Meng Wee has 'more credits' than Wen Zhi, Meng Wee's credits should at least be -$4.99.)




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