Why is it not possuble to improve the quality of doughnuts. I do not have the option of such product in the menu of products for quality research.
research for doughnuts
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Manual:
"Not each research building can "investigate" each product.
Research building a level 0 (starting level) can only products research level 0 investigate.
The additionally following products the research level can investigate the further
building level:
Research building level Research level
1 1 - 5
2 6 - 10
3 11 - 15
. .
. .
. .
10 46 - 50 " -
i noticed the same thing w/chairs, i can't ql it!
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You must upgrade your research building before you can research products from higher levels. =)