20 tiles are available 10% must be added with tiles cost R234 box of 6 tiles how much to be spent?

First, calculate the cost of one tile:
234 / 6 = R39 per tile

Next, calculate the cost of adding 10% more tiles:
20 * 0.10 = 2 extra tiles
20 + 2 = 22 total tiles

22 * R39 = R858

Therefore, R858 must be spent to purchase 22 tiles.

Step 1: Calculate the number of tiles needed

20 tiles x 1.1 (10% markup) = 22 tiles

Step 2: Calculate the number of boxes needed

22 tiles ÷ 6 tiles/box = 3.67 boxes

Since we cannot buy a fraction of a box, we will round up to 4 boxes.

Step 3: Calculate the cost of the tiles

4 boxes x R234/box = R936

Therefore, the total amount to be spent is R936.