public calculateRSSTACC(): number {
    const average_total_assets: number = (this.currentYear.totalAssets + this.prevYear.totalAssets) / 2;

    const WCCurrent: number = (this.currentYear.totalCurrentAssets - this.currentYear.cashAndCashEquivalents)
        - (this.currentYear.totalCurrentLiabilities - this.currentYear.currentDebt);

    const WCPrev: number = (this.prevYear.totalCurrentAssets - this.prevYear.cashAndCashEquivalents)
        - (this.prevYear.totalCurrentLiabilities - this.prevYear.currentDebt);

    const dWC: number = WCCurrent - WCPrev;

    const NCOCurrent: number = (this.currentYear.totalAssets - this.currentYear.totalCurrentAssets)
        - (this.currentYear.totalLiabilities - this.currentYear.totalCurrentLiabilities - (this.currentYear.totalDebt - this.currentYear.currentDebt));

    const NCOprev: number = (this.prevYear.totalAssets - this.prevYear.totalCurrentAssets)
        - (this.prevYear.totalLiabilities - this.prevYear.totalCurrentLiabilities - (this.prevYear.totalDebt - this.prevYear.currentDebt));

    const dNCO: number = NCOCurrent - NCOprev;

    const rsst_acc: number = (dWC + dNCO) / average_total_assets;

    return rsst_acc;
}