Calculating a payout scenario

[Luisa974]

This is a detailed financial breakdown of a sample guest stay for 12 nights in mexico. I have been unable to understand some aspects about the payout calculation. My questions follow the table breakdowns below: 

Table 1. Guest Paid
12 nights	$988.80
Cleaning fee	$50.00
Guest Service Fee	$146.65
Occupancy Taxes	$195.87
Total USD	$1,381.32

Table 2. HOST PAYOUT
Adjusted daily room fee	Amount
Fri, 04/11	$69.60
Sun, 04/12	$77.60
Wed, 04/13	$73.60
Thu, 04/14	$81.60
Fri, 04/15	$105.60
Sat, 04/16	$108.80
Sun, 04/17	$92.00
Mon, 04/18	$80.80
Tue, 04/19	$74.40
Wed, 04/20	$70.40
Thu, 04/21	$72.80
Fri, 04/22	$81.60
Sub Total	$988.80
Cleaning Fee	$50.00
Host Service Fee	-$31.16
Remitted Occupancy Tax	$166.21
Total	$1,173.85

Next, below are the bank deposits (Note: 10% goes to co-host):

Table 3. Bank Deposits	Amount
Bank Transaction to host	$906.88
Tax Withholding Mex Income	-$186.98
Tax Withholding Mex VAT	-$149.59
Host Remitted Tax	$166.21
Total	$736.52
Bank Transaction to Co-host	$100.76
Tax Withholding Mex Income	-$20.78
Tax Withholding Mex VAT	-$16.62
Total	$63.36

questions: 

1) Why is there a host remitted tax?  What is it? 

2) Why isn't there a co-host remitted tax? 

3) If the co-host keeps 10% of total host payout why is the bank transaction to co-host $100.76? should it not be 10% of $1,173.85 = $117.38? 

4) Why is there a Mexican VAT tax withholding? 

5) How is the host service fee of $31.16 calculated? my understanding is that airbnb charges 3%

Thanks 

[Mike-And-Jane0]

@Luisa974 sadly we have lost @Sarah977 but in her absence:

Q5 The 3% fee is correct and 3% of 988.8+50 is 31.16 so I see nothing wrong there.

Q3 The co host has not shared in the remitted occupancy tax which seems sensible to me

Q1 A guess now but I suspect this is a tax Mexico requires you to charge but doesn't remit to Mexico itself. As a result it has been sent to you to allow you to remit it to the correct Mexican authority