SAP Function Module search on PSA_G
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PSA_GET_CALC_SCHEME_DETAIL - PSC: Get details of the calculation scheme
PSA_GET_COST_INPUT - Read costs from PSC ledger
PSA_GET_LEDGERS - Ledgers for PSA
PSA_GET_LEDGER_CURRENCY - Get ledger currency from PSC source ledger
PSA_GET_PROD_MONTH_BY_MONTH - Get input data for production
PSA_GET_PSC_PRODUCT_CALC - called in exit from rollup to find PSC, product and calculation type
PSA_GET_VOLUMES - Get the volumes for a specific PSC and timeframe
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