#stacks_in_17_float {
	float:left;
	width:46%;
}
#stacks_in_17 {
	margin:  20px;
}

#stacks_in_20 {
	margin:  20px;
}
#stacks_in_22_float {
	float:left;
	width:46%;
}
#stacks_in_22 {
	margin:  20px;
}

#stacks_in_31 {
	margin:  20px;
}
#stacks_in_25_float {
	float:left;
	width:46%;
}
#stacks_in_25 {
	margin:  20px;
}

#stacks_in_33 {
	margin:  20px;
}
#stacks_in_28_float {
	float:left;
	width:46%;
}
#stacks_in_28 {
	margin:  20px;
}

#stacks_in_35 {
	margin:  20px;
}