Tammy,
Inspect your file,
/skin/books_and_magazines/customer/main/products_t.tpl
You should see something like this:
Code:
<div class="market-price">{$lng.lbl_market_price}:
<span class="market-price-value">{currency value=$product.list_price}</span>
{if $product.appearance.market_price_discount gt 0}
{if $config.General.alter_currency_symbol ne ""}, {/if}
<span class="price-save">{$lng.lbl_save_price}{$product.appearance.market_price_discount}%</span>
{/if}
</div>
make sure you haven't commented it out?