If it is not an error, it could be the shipping costing them, and consequently you, more money. I read a report that said everything will be going up, from UPS/Fedex, vegetables (gas to get them to market) and airfare, just about anything related to fuel cost.
it may also be due to the weather. There are a few suppliers that i have checked out that charge a little more once the weather gets warmer to ship their items (or it cost more to get shipped to them) b/c they need to keep it cool. Granted shortening has a high melt temperature, however it can get hot in those trucks and better safe than sorry.
I haven't seen this with shortening, mainly only with chocolate, but it could still be part of the problem
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