<think>Alright, let me try to figure this out step by step. So, the problem is about Tina's earnings when she works overtime. Let me start by understanding the details given.

Okay, Tina makes $18.00 an hour normally. If she works more than 8 hours in a shift, she gets overtime pay. The overtime pay is her regular hourly wage plus half of that, right? So that would be $18 + (1/2)*$18. Let me calculate that first. Half of 18 is 9, so overtime pay is 18 + 9 = $27 per hour. Got that part.

Now, she works 10 hours every day for 5 days. Hmm. So each day she works 2 hours of overtime because 10 hours minus 8 hours is 2. Let me confirm: 10 hours per shift. The first 8 hours are regular pay, and the remaining 2 hours are overtime. Yeah, that makes sense.

So, per day, her earnings would be 8 hours * $18 plus 2 hours * $27. Let me write that down per day:

Regular pay per day: 8 * 18
Overtime pay per day: 2 * 27

Then, since she works 5 days, we'll multiply the total daily earnings by 5.

Wait, maybe break it down into total regular hours and total overtime hours across the 5 days? Either way, I can check both methods. Let me do both to make sure.

First method: Calculate daily earnings then multiply by 5.

Regular pay per day: 8 * 18 = $144
Overtime per day: 2 * 27 = $54
Total per day: 144 + 54 = $198
Then over 5 days: 198 * 5 = $990

Second method: Calculate total regular hours and total overtime hours over 5 days.

Regular hours per day: 8 hours, so 8 * 5 = 40 hours
Overtime hours per day: 2 hours, so 2 * 5 = 10 hours
Regular total: 40 * 18 = $720
Overtime total: 10 * 27 = $270
Total earnings: 720 + 270 = $990

Either way, I end up with $990. Hmm, that seems straightforward.

Wait a second, let me check on the overtime rate again. The problem says: "your hourly wage + 1/2 your hourly wage". So, 18 + (1/2)(18) = 18 + 9 = $27. Correct. So the overtime rate is time-and-a-half, which is standard. So that part checks out.

Calculations for each step:

Regular per day: 8*18. Let's compute 8*10=80, 8*8=64; 80+64=144. Yes, $144. Then 2*27=54. 144+54=198 per day. Five days: 198*5. Let's compute 200*5=1000, minus 2*5=10, so 1000-10=990. Yes.

Alternatively, total hours: 40 regular * 18. 40*10=400, 40*8=320; 400+320=720. Total overtime 10*27. 10*20=200, 10*7=70; 200+70=270. 720+270=990. Same result.

So both methods confirm the total is $990. Seems pretty straight forward. I can't see any mistakes here. Let me just rephrase to ensure clarity.

Tina works 10 hours a day. Each day comprises 8 regular hours and 2 overtime hours. The regular rate is $18, overtime is $27. So each day she earns (8*18)+(2*27). Then times 5 days. All arithmetic checks out. Answer should be $990.
</think>

Tina earns $18.00 per hour for regular time and $27.00 per hour for overtime (1.5 times her regular rate). Each day, she works **8 regular hours** and **2 overtime hours**.  

**Daily Earnings Calculation:**  
- Regular pay: \( 8 \, \text{hours} \times \$18 = \$144 \)  
- Overtime pay: \( 2 \, \text{hours} \times \$27 = \$54 \)  
- Total per day: \( \$144 + \$54 = \$198 \)  

**Total Over 5 Days:**  
\( 5 \, \text{days} \times \$198 = \$990 \)  

**Verification (Alternative Method):**  
- Total regular hours: \( 8 \times 5 = 40 \, \text{hours} \)  
  \( 40 \times \$18 = \$720 \)  
- Total overtime hours: \( 2 \times 5 = 10 \, \text{hours} \)  
  \( 10 \times \$27 = \$270 \)  
- Combined total: \( \$720 + \$270 = \$990 \)  

**Final Answer:** \boxed{990}