When adding to the cart do part and whole units separately

• a decimal unit (0.2)
• or
• a whole unit (1, 3, 7 etc)
• don't try to add both at the same time, the cart will combine them as you add them.

EG you need 2.5m3,

• At 1.3Tonne per Cubic metre the required weight will be 3.25 Tonne
• Decide if you wish 3.2T or 3.4T

Then add the amounts to the cart

• Add 0.2 once or twice
• Then add the whole unit - in this case 3
• The Cart will show 3.2 T or 3.4 T based on your decision at the beginning