sticky cart icon with et-cart-info

I've added a sticky button to my page https://sunbambu.com/ but... i'd like to this button to display cart items
t
his is my PHP
<div id="ds-sticky-button"> <a href="https://sunbambu.com/cart/" class="et-cart-info"> <i class="fa fa-shopping-cart"></i></a></div>

and css
#ds-sticky-button a {
-webkit-border-radius: 0;
-moz-border-radius: 0;
border-radius: 50%;
border: 0;
color: black !important;
font-size: 30px;
background: transparent;
padding: 5px 15px 5px 15px;
text-decoration: none;
}

/*Styles the button on hover - You can edit all these values to match your design*/
#ds-sticky-button a:hover {
background: black;
color: white !important;
text-decoration: none;
}
.et-cart-info {
display: inline-block!important;
}