Sample script to resize a cube based on Sharecart 1000 value.

SizeBox.cs

using UnityEngine;
using System.Collections;

public class SizeBox : MonoBehaviour {
	float targetX;
		
	// Use this for initialization
	void Start () {
		targetX = ShareCartOneThousand.MapX;
	}
	
	// Update is called once per frame
	void Update () {
		float newX = Mathf.MoveTowards(transform.localScale.x,
			targetX,
			Time.deltaTime);
		transform.localScale = new Vector3(newX, 1, 1);
	}
}