Image size vs image quality/compression ratio Powershot A3000

Picked up this camera on Ebay because I read some good reviews, but for the life of me I can't get a resolution more than 180 dpi, whether I follow the directions in the manual for setting manually in the P mode for either size or quality. If I want to print something, it should be at least 300dpi. I want my images to have enough pixels for a nice print. Is there something I am not seeing? Does this camera even have the capability of doing that? Thanks for any input.
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nesca wrote:
you want keep maximum quality while compressing ?generally I shall resize image and save it as .jpg and then print it.however image saving and printing guide found by Google may give you some useful info.
thanks for sharing, that's awesome but somewhat overpriced for me who will just use it only once, do you have some cheaper or even free versions, any suggestion will be appreciated!

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