SASS, What is the correct way to call a mixin?

I just started using SASS and I am trying to figure out how to create a box shadow mixin... I copied this mixin from another stack overflow post.. ``` @mixin box-shadow($top, $left, $blur, $color, $inset:"") { -webkit-box-shadow:$top $left $blur $color #{$inset}; -moz-box-shadow:$top $left $blur $color #{$inset}; box-shadow:$top $left $blur $color #{$inset}; } ``` However I am not sure exactly how to format my `@include` This is what I have so far for my @include ``` @include box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075); ``` And this is my output error... ``` error(Line 1003: Invalid CSS after "...lude box-shadow": expected "}", was ": inset 0 1px 1...") ```