Rent a warehouse to stack 3 tons of goods at a monthly rent of 7,000 yuan. These goods were originally planned to be sold for 3 months. Because the price was lowered, it was sold out within 2 months. Because the warehouse funds were saved, the settlement made 1,000 yuan more than the original plan. Please calculate how much the price per kilogram of goods has been reduced?
租用仓库房堆放3吨货物，每月租金7000元，这些货物原计划要销售3个月．由于降低了价格，结果2个月就销售完了，由于节省了仓库资金，所以结算下来，反而比原计划多赚了1000元．请计算每千克货物的价格降低了多少元？
<gadget id="calculator">7_000 - 1_000</gadget>
<output>6_000</output>

<gadget id="calculator">3 * 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">6_000 / 3_000</gadget>
<output>2</output>

<result>2</result>