1. A field has recently been brought into production. 14 development wells have already been drilled but a further 7 development wells have yet to be drilled. Depreciation is based only on those reserves that are proved and developed. Capitalised exploration and appraisal costs $62,000,000 Capitalised development costs $874,000,000 Total proved reserves 326,000,000 barrels Proved developed reserves 214,000,000 barrels Production in period 21,000,000 barrels Calculate DD&A charge for the accounting period using: a) Proved developed reserves only; b) Total proved reserves