Plane cargo challenge

fb_cargo.js

var items = {
	'LJS93K': {
		pounds: 1300,
		cost: 10500
	},
	'J38ZZ9': {
		pounds: 700,
		cost: 4750
	},
	'HJ394L': {
		pounds: 200,
		cost: 3250
	},
	'O1IE82': {
		pounds: 75,
		cost: 10250
	}
},
	minWeight = 1250,
	removedWeight = 0,
	remainingWeight = minWeight,
	removedCost = 0,
	costPerPound = [];

for(item in items) {
	var sku = item, item = items[item];
	costPerPound.push({cost: Math.ceil(item.cost/item.pounds), sku: sku });
}

costPerPound.sort(function(a,b) {
	if(a.cost<b.cost) return -1;
	if(a.cost>b.cost) return 1;
	return 0;
});

for(var i = 0, c = costPerPound.length; i < c; i++) {
	var totalWeight = 0, totalCost = 0, item = items[costPerPound[i].sku];
	if(removedWeight < minWeight) {
		totalWeight = (item.pounds <= remainingWeight) ? item.pounds : remainingWeight;
		totalCost = totalWeight * costPerPound[i].cost;
		removedCost += totalCost;
		removedWeight += totalWeight;
		remainingWeight -= totalWeight;
	}
}

print(removedCost);