In a contract drawn up by Goldberg Company, it agreed to sell and Edwards Contracting Company agreed to buy wood shingles at $650. After the shingles were delivered and used, Goldberg Company billed Edwards Company at $650 per bunch of nine hundred shingles. Edwards Company refused to pay because it thought the contract meant $650 per thousand shingles. Goldberg Company brought action to recover on the basis of $650 per bunch. The evidence showed that there was no applicable custom or usage in the trade and that each party held its belief in good faith.