Steve Johnston yes It's Very Simple. Hope you have basic knowledge of Product, Attributes and Attribute set like how to create , update, delete.
Step 1 : Login in your Magento backend. and go to catalog >> Attributes >> Manage Attribute
Click on that.
Step 2 : Now pres son Add New Attribute
. please the all the necessary detail and save button. make sure have to remember the Attribute Code
of the Attribute.
Step 3: go to catalog >> Attributes >> Manage Attribute set
Click on that. select which attribute set you are using at time of product creation. Assign to that attribute to that set. Make sure you can assign that attribute in new tab with Custom Attribute
.
Step 4: Now go to catalog >> manage product
. Open that Attribute Set product find the Custom Attribute
tab and in that you can see the new Attribute which you have created.
Step 5: Enter value like 1/2 LBS
and save the Product. Refresh all the cache if Enable.
Step 6: Now you have done with the backend now we have to display that Arbitrate in listing page as well as detail page of Product. Right Now I am assign to default Magento Theme.
Step 7: open this file app\design\frontend\rwd\default\template\catalog\product\list.phtml
. find below thing in this file it will coming two times.after that add below line also.
<?php echo $this->getPriceHtml($_product, true) ?>
<span><?php echo $this->__("per").$_product->getData('Attribute Code'); ?></span>
Step 8: open this file app\design\frontend\rwd\default\template\catalog\product\view.phtml
add below code same as above like.
<div class="price-info">
<?php echo $this->getPriceHtml($_product); ?>
<?php echo $this->getChildHtml('bundle_prices') ?>
<?php echo $this->getTierPriceHtml() ?>
<span><?php echo $this->__("per").$_product->getData('Attribute Code'); ?></span>
</div>
Step 9: You have to set CSS as per your Theme.