The price of bread in Zimbabwe has increased by 20% to $1.20 per loaf due to new taxes introduced by Finance minister Mthuli Ncube. This has led to a survey showing that bread now costs between $10,000 and $11,000 at major supermarkets in Harare. The increase in the price of bread is attributed to movements in the exchange rate and changes in tax measures, specifically regarding input tax on production and distribution costs.