Supermarket staples like pasta, tinned tomatoes, and strawberry jam increased in price by around 8 percent in just one year. According to new figures, the overall price of a basket of 15 standard food items rose by £1.32 ($1.79). The data analysed by the BBC came from the retail research firm Assosia, which tracked the average cost of grocery items at Asda, Morrisons, Sainsbury’s, and Tesco. The company recorded more than 17,000 price increases across the main supermarkets in January, more than double the number in the same month last year, and across every category. Not all products have seen an increase, though. Items like carrots and mild cheddar fell slightly in price. Assosia director Kay Staniland said the findings were a result of selecting popular products that were comparable across the ranges of value and standard. She added in comments to the BBC: “Looking at food prices is a …