Here is an order with 13 oz in the cart. This is a successful order.
<?xml version="1.0"?>
<RateV3Response><Package ID="0"><ZipOrigination>11740</ZipOrigination><ZipDestination>52245</ZipDestination><Pounds>0</Pounds><Ounces>13.0</Ounces><Size>REGULAR</Size><Machinable>TRUE</Machinable><Zone>5</Zone><Postage CLASSID="23"><MailService>Express Mail Sunday/Holiday Guarantee</MailService><Rate>32.00</Rate></Postage><Postage CLASSID="25"><MailService>Express Mail Flat-Rate Envelope Sunday/Holiday Guarantee</MailService><Rate>28.75</Rate></Postage><Postage CLASSID="2"><MailService>Express Mail PO to PO</MailService><Rate>17.10</Rate></Postage><Postage CLASSID="3"><MailService>Express Mail</MailService><Rate>19.50</Rate></Postage><Postage CLASSID="13"><MailService>Express Mail Flat-Rate Envelope</MailService><Rate>16.25</Rate></Postage><Postage CLASSID="1"><MailService>Priority Mail</MailService><Rate>4.60</Rate></Postage><Postage CLASSID="16"><MailService>Priority Mail Flat-Rate Envelope</MailService><Rate>4.60</Rate></Postage><Postage CLASSID="17"><MailService>Priority Mail Flat-Rate Box</MailService><Rate>8.95</Rate></Postage><Postage CLASSID="22"><MailService>Priority Mail Large Flat-Rate Box</MailService><Rate>12.95</Rate></Postage><Postage CLASSID="0"><MailService>First-Class Mail Flat</MailService><Rate>2.84</Rate></Postage><Postage CLASSID="0"><MailService>First-Class Mail Parcel</MailService><Rate>3.17</Rate></Postage><Postage CLASSID="4"><MailService>Parcel Post</MailService><Rate>4.50</Rate></Postage><Postage CLASSID="5"><MailService>Bound Printed Matter</MailService><Rate>2.30</Rate></Postage><Postage CLASSID="6"><MailService>Media Mail</MailService><Rate>2.13</Rate></Postage><Postage CLASSID="7"><MailService>Library Mail</MailService><Rate>2.02</Rate></Postage></Package></RateV3Response>U.S.P.S. First-Class Mail Flat: $4.84
Joined: 01/18/2008