Look at the individual materials for costs. This is just a set of notes for now
6mm black mdf top + 2×6mm medite approx £580 That is using 320mm tiles and Kitronic black MDF with kitronic 600x400x6mm medite so 64 × £4.20 + 128 × £2.40 = £576
3 × 6mm medite approx £400 If using Kitronic sheets 600x400x3 => 192 x £2.40 = £460. Very wasteful. Kitronic 600x400 sheets represent 50% waste
1x6mm + 1x12mm medite approx £320
6mm black mdf + 12mm medite Approx £256 + £130 = £400