Limit Purchase Total

function pw_edd_limit_total_purchase() {

	if( edd_get_cart_total() > 100 ) {

		edd_set_error( 'too_much', 'You cannot purchase that much at one time.' );

	}

}

add_action( 'edd_checkout_error_checks', 'pw_edd_limit_total_purchase' );