Insert price, product short description of woocommerce into meta seo by yoast?

I have read about this in many post but useless http://ift.tt/1yc813B

I have tried %%cf_amount%% %%cf_sale_price%% %%cf__sale_price%% %%cf_regular_price%%

for price but nothing happen.

About the product description, i tried %%cf_short_description%% but useless too.

Any idea?

http://ift.tt/1dJeqvV