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在官方代码后补充 sums[index] = parseFloat(sums[index]).toFixed(2);

	   	getSummaries(param) {
                const { columns, data } = param;
                const sums = [];
                const nu = '';
                columns.forEach((column, index) => {
                    if (index === 0) {
                        sums[index] = '合计';
                        return;
                    }
                    if( index === 1 || index === 2 ){
                        sums[index] = 'N/A';
                        return;
                    }
                    const values = data.map(item => Number(item[column.property]));

                    if (!values.every(value => isNaN(value))) {
                        sums[index] = values.reduce((prev, curr) => {


                             const value = Number(curr);


                            if (!isNaN(value)) {

                               
                                return prev + curr;
                                

                            } else {
                                return prev;
                            }
                        }, 0);

                        //处理精度代码  
                        if( index === 6 || index === 8 || index === 14 || index === 13 || index === 15 || index === 16){
                            sums[index] = parseFloat(sums[index]).toFixed(2);
                        }

                        // sums[index] += ' 元';
                    } else {
                        sums[index] = 'N/A';
                    }

                });
             
                return sums;
            },