Pre-approved for FHA loan but estimated monthy payment does not sound right

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I have been pre-approved for a 100% FHA loan for up to $70,000. It would be 3.5% down, however, the estimated monthly payment she quotes me does not sound at all right. Note: This is a 30 year fixed.

P&I $304.70

Ins 40.00

Tax 95.00

MI 70.00

PITI $509.70 ( principal, interest, taxes, insurance

Are these calculations worth the payment? Is it too much a month and should I look for a different source of loan?