Outline rugby player protection, calculate sport kit cost per player with VAT (15%), and determine the total kit cost for 20 players.

Here are four items a rugby player should have for protection:

• Headguard
• Shoulder pads
• Gum shield (mouthguard)
• Strapping/Tape for joints

Assumption: The standard VAT rate is 15%.
Assumption: A sport kit (jersey, shorts, socks) for one player costs R800, excluding boots.

First, calculate the VAT amount on the kit.

$$\text{VAT} = 15\% \times \text{R}800$$ $$\text{VAT} = 0.15 \times \text{R}800 = \text{R}120$$

Next, calculate the total cost per player including VAT.

$$\text{Total Cost per Player} = \text{R}800 + \text{R}120 = \text{R}920$$

The total amount (including VAT) he would spend on each player is:

$$\boxed{\text{R}920}$$

Assumption: A standard rugby team has 15 in-field players.
The total number of players needing sport kits is 15 (in-field) + 5 (out-players) = 20 players.
The total cost for 20 sport kits (including VAT) would be:

$$\text{Total Cost for 20 Kits} = 20 \times \text{R}920 = \text{R}18\,400$$

The question refers to "all the money" Mr Sipho Mopayi intends to spend, but this total budget is not provided. Therefore, it is not possible to verify whether his assumption is correct without knowing the total amount of money he has available.

Assumption: The standard VAT rate is 15%.
Assumption: The price of rugby boots (excluding VAT) is R1200.

Calculate the VAT amount on the rugby boots.

$$\text{VAT on Boots} = 15\% \times \text{R}1200$$ $$\text{VAT on Boots} = 0.15 \times \text{R}1200 = \text{R}180$$

The VAT amount on the price of rugby boots is:

$$\boxed{\text{R}180}$$