You can buy regular potatoes in the veg section for about 70p per kg in Sainsbury's and Tesco.
The cheapest frozen chips are about double that £1.30 to £1.40 which seems kinda reasonable.
Sweet potatoes are £1.19 per kg in the veg section.
But the cheapest frozen sweet potato fries are almost £6 in Sainsbury's and even more expensive, £7 per kg, in Tesco, that's a mark up of 5/6 times!
They are even more expensive than some fresh meat products like chicken drumsticks, chicken thighs and beef burgers etc which seems crazy.
Obviously I will be chopping up my own sweet potatoes rather than paying that ridiculous price but just posting for anyone who wasn't aware of the incredible mark up.