You have posted to a user forum and not to hp itself. What you need to do is go to the information menu on the printer and go to the supplies information and print. This will give a sheet with all four colors listed, when installed, how many pages printer and how many remaining. Use this a guide if you need to return the toners to where you bought them. One word of caution, there will be a listing of percentage coverage for each color. The default is 5%. I have seen instances where this figure can be as high as 30% which will cause the percentage of toner to decrease fast since the printer thinks it is using more toner then it is actually using. In other words the cartridges may still have much more toner in them but because of coverage the printers thinks they have less.
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