no, the title is in no way accurate. It's wrong.

The chain expects that the prices it has to pay (!) for goods are rising 20-50% in the coming weeks (!). Aldi is expected on monday (today) to rise some (!) of ALDI prices significantly (!) - for meat, butter, ...

Einkaufspreis = ALDI buys things, the prices ALDI pays -> expected to rise 20%-50% in the coming weeks

Verkaufspreis = ALDI sells things, the prices consumers have to pay -> some prices already are expected to rise significantly on monday