which are subject to considerable losses in their volume or mass and which are sold by number or weighed in the presence of the purchaser;
bianna a d’fhéadfadh cuid shuntasach dá thoirt nó dá mhais a chailleadh agus a dhíoltar de réir an lín nó a dhéantar a mheá i láthair an cheannaitheora;