Alright, imagine you're playing with your favorite toys at home. Now, if you ask me how many toys you have, I can easily tell you by counting them one by one.

In the same way, a company called Tesla makes cars that don't use gasoline but electricity instead (we call these "electric vehicles" or EVs). Every time Tesla sells one of their cars, it's like adding another toy to your room. So, if Tesla says they've sold 10 cars this month, we know they've made $10,000 in sales because each car is priced at a thousand dollars (you can change the number if you want).

Now, let's say that tomorrow, Tesla has sold only 5 cars compared to last week. If we wanted to find out how much their total earnings have changed from last week, we would subtract today's sales ($5,000) from last week's sales ($10,000). That means we get a "negative" number (-$5,000), which tells us that Tesla made $5,000 less this week compared to last week.

To make it even simpler:
- When the change is positive (like +$2,000), it means they made more money than before.
- Example: Tesla sold 7 cars today. Change in sales: ($1,000 * 7) - $5,000 = +$2,000
- When the change is negative (like -$3,000), it means they made less money than before.
- Example: Tesla sold only 4 cars today. Change in sales: ($1,000 * 4) - $5,000 = -$3,000

So, "Change in sales" is like knowing if you got more or fewer toys this week compared to last week! Read from source...

Based on the text provided, here are some aspects of Tesla and Elon Musk that could be subjected to critical analysis or opposing viewpoints:

1. **Green Image Inconsistency:**
- Critics argue that while Tesla promotes itself as a green company, its production processes have significant environmental impacts. The manufacturing of electric vehicles (EVs) requires substantial energy and resources, which can lead to carbon emissions if not powered by 100% renewable sources.
- Some critics point out the environmental footprint of mining for battery materials like lithium, which Tesla relies on heavily.

2. **Product Quality and Recalls:**
- While Tesla is known for its innovative technology, some consumers and industry experts have raised concerns about the quality and reliability of certain models, particularly in their early years.
- Tesla has faced several recalls, although many are related to software updates that can be done remotely.

3. **Work Culture and Labor Practices:**
- Some former employees and labor advocates have criticized Tesla's work culture as prioritizing production speed over worker safety and well-being.
- Reports of union-busting activities and workers' rights challenges have also surfaced.

4. **Elon Musk's Behavior and Decision-Making:**
- Critics often point to Elon Musk's erratic tweets, eccentric behavior, and perceived lack of accountability as problematic for a company CEO.
- Some argue that his decisions, such as the public feud with Wall Street short-sellers or the aborted Twitter takeover, have more to do with personal grudges or ego than sound business strategy.

5. **Tesla's Market Dominance and Price Point:**
- While Tesla has undeniably popularized EVs and accelerated their adoption, critics argue that its luxury price point makes it inaccessible to many consumers.
- Some also suggest that Tesla's market dominance can stifle competition in the EV sector.

6. **Autonomy and Safety of Autopilot:**
- Despite Tesla's claims about the safety of its Autopilot feature, there have been several high-profile crashes involving Teslas using Autopilot, including some fatalities.
- While some argue that these incidents are rare given the total miles driven with Autopilot, others contend that media coverage disproportionately focuses on such events due to their sensational nature.

7. **Debates Over Tesla's Valuation and Fundamentals:**
- Some analysts and investors criticize Tesla's stock valuation as overinflated based on traditional automotive metrics, arguing that it's more akin to a tech or growth stock.
- This leads to heated debates about whether Tesla's fundamentals can support its high market capitalization.

Based on the provided article, here's a sentiment analysis:

- Bulls will be happy to learn about Tesla Energy's significant growth in energy storage deployments, aiming for 50% compound annual growth rate. The company is ramping production and plans to quadruple lithium refining capacity.
- Bears may note that despite these advancements, Tesla Inc.'s total revenue miss due to lower-than-expected vehicle deliveries.
- There's also a negative sentiment when mentioning the company missing its delivery guidance due to unforeseen challenges at Gigafactory Shanghai.

Overall Sentiment: Mixed (bullish on energy storage growth and production capacity expansion; bearish due to missed delivery targets).