If you have a return character you need to include in your left boundary (LB) or right boundary (RB) use "\r\n" in the string.
web_reg_save_param("sOrderTotal", "LB=ctl00_generated_css\">\r\n $", "RB=</span></div>", LAST);
That string would be used to parse the dollar value out of the html below....
<div class="orderTotal">
<div class="rowLbl">
Total:</div>
<div class="rowValue">
<span id="ctl00_generated_css">
$3,170.64</span></div>
<div class="hibbityjibbity" >
</div>