Xiaohua's family ordered 3 bags of fresh milk every day in April, and paid a total of 85.5 yuan at the wholesale price (1.10 yuan for a bag of fresh milk at the retail price). How much cheaper is each bag than the retail price?
小华家四月份每天预订3袋保鲜奶，按批发价共付85.5元(零售价一袋鲜奶1.10元)，这样每袋比零售价便宜多少元？
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">85.5 / 90</gadget>
<output>0.95</output>

<gadget id="calculator">1.1 - 0.95</gadget>
<output>0.15</output>

<result>0.15</result>