ค่าไฟใหม่ MAY vs JUN เราคำนวนจุดตัดได้ที่ 665 หน่วย ผิดหรือถูก?

UNIT,BILL_OLD_APR_FT,BILL_OLD_MAY_FT,BILL_NEW_JUN_FT,BILL_NEW_JUN
650,2927.450,2972.727,2964.023,2851.143
651,2932.286,2977.632,2969.547,2856.493
652,2937.121,2982.537,2975.070,2861.843
653,2941.956,2987.442,2980.594,2867.193
654,2946.791,2992.347,2986.118,2872.543
655,2951.627,2997.252,2991.641,2877.893
656,2956.462,3002.157,2997.165,2883.243
657,2961.297,3007.062,3002.689,2888.593
658,2966.132,3011.967,3008.212,2893.943
659,2970.967,3016.871,3013.736,2899.293
660,2975.803,3021.776,3019.260,2904.643
661,2980.638,3026.681,3024.783,2909.993
662,2985.473,3031.586,3030.307,2915.343
663,2990.308,3036.491,3035.831,2920.693
664,2995.144,3041.396,3041.354,2926.043
665,2999.979,3046.301,3046.878,2931.393
666,3004.814,3051.206,3052.402,2936.743
667,3009.649,3056.110,3057.925,2942.093
668,3014.484,3061.015,3063.449,2947.443
669,3019.320,3065.920,3068.973,2952.793
670,3024.155,3070.825,3074.496,2958.143
671,3028.990,3075.730,3080.020,2963.493
672,3033.825,3080.635,3085.544,2968.843
673,3038.661,3085.540,3091.067,2974.193
674,3043.496,3090.445,3096.591,2979.543
675,3048.331,3095.350,3102.115,2984.893
676,3053.166,3100.254,3107.638,2990.243
677,3058.001,3105.159,3113.162,2995.593
678,3062.837,3110.064,3118.686,3000.943
679,3067.672,3114.969,3124.209,3006.293
680,3072.507,3119.874,3129.733,3011.643