Lee Willis

Allows you to store a set of “Requirements” against a product, and display those on the product page in a widget. With built in compatibility for Easy Digital Downloads, WooCommerce and WP e-Commerce – easily edit your products’ requirements on the main WordPress post editing screen, and display them in a widget on your store’s front end.
The plugin’s available for forking and contribution over on <a href="https://github.com/leewillis77/Product-Requirements" rel="nofollow ugc">GitHub</a>

Product Requirements

Allows you to store a set of "Requirements" against a product, and display those on the product page in a widget.

MohammadJafar Khajeh

You can specify a minimum quantity for a product. When the user adds the product to the cart and if the number of wanted quantity was greater than the minimum you specific, the price of the product will change to what you want. 
That price can be a percent or a specific value. 
This is wholesale.
<h4>One more thing</h4>
The plugin using i18n, So you can translate it for your language. 
The plugin has been translated to Persian already.
<a href="https://github.com/mjkhajeh/woocommerce-wholesale" rel="nofollow ugc">GitHub Repo</a>

Wholesale

Changes the price of the product in the shopping cart according to its quantity

Product Requirements vs Wholesale