Conky show RAM without buffers or cache

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http://askubuntu.com – I am wondering if there's a way to get Conky to show the RAM that is in use minus the buffers and cache. When I close a program, the RAM usage goes down in HTOP, but in conky it stays the same. So I'd like to see it represented correctly on Conky. Note in this picture, HTOP shows that there's 1300mb of RAM used, and Conky shows 2.15 because it includes cache and buffers. Here's the chunk of Conky code that deals with RAM ${font Arial:bold:size=10}${color White}MEMORY ${color DarkSlateGray}${hr 2} $font${color DimGray}MEM $alignc $mem / $memmax $alignr $memperc% $membar (HowTos)