Aid agencies are battling to meet the urgent needs of tens and thousands of displaced, homeless and injured people in Gaza, as well as to get damaged water, power and sewage infrastructure back even to their ailing pre-war levels. That stage alone will cost "hundreds of millions" of dollars, while long term reconstruction will run into "billions," the UN has said. Two separate Palestinian surveys have put the cost of the damage just under $2bn. [...] Even before the Israeli assault, aid agencies were warning of malnutrition in Gaza, as the aid-reliant population struggled to afford and access dairy, meat and fresh vegetable products to supplement the bread, rice and oil that form the backbone of humanitarian aid. Although food aid has entered the strip during and since the fighting, security problems hampered distribution, while damage to tunnels under the Egyptian border and agricultural fields have pushed up prices for other goods. [...] UN food agency the World Food Programme (WFP) says the price of chicken increased 23% percent; the price of wheat flour by 45%; the price of peppers by 100% and the price of tomatoes by 500%.