Calculate the total cost for 2019 m of fencing using 5m rolls costing R162.50 each. 1.3) Determine the number of fence poles needed for 2019 m of fencing with 4.8 m spacing. 1.4) Calculate the cost

Since you cannot buy a fraction of a roll, you must purchase 404 rolls to cover the entire length.

The final answer is $\boxed{R65650.00}$.

For a linear fence, the number of poles is the number of intervals rounded up, plus one for the starting pole.

The final answer is $\boxed{422 \text{ poles}}$.

Total poles needed: 422.
Number of groups of 6:

So, 70 groups of 6 poles will be bought, and 2 poles will be bought individually.
Cost for groups: $70 \times R500 = R35000$.
Cost for individual poles: $2 \times R98.00 = R196.00$.
Total cost (groups + singles): $R35000 + R196.00 = R35196.00$.

The cost of buying in groups and remaining singles ($R35196.00$) is less than buying all individually ($R41356.00$).
The final answer is $\boxed{R35196.00}$.