Calculate the returns for the monthly price data. Each month $500 was withdrawn at the end of the month. How much money was in the account at the end of the data? When did the account have the most money? How much was it? When did the account have the least money? How much was it?

Date	PFE	Adj PFE
12/1/15	32.279999	27.578041
1/1/16	30.49	26.048777
2/1/16	29.67	25.348219
3/1/16	29.639999	25.577169
4/1/16	32.709999	28.226358
5/1/16	34.700001	29.94359
6/1/16	35.209999	30.655773
7/1/16	36.889999	32.118469
8/1/16	34.799999	30.298807
9/1/16	33.869999	29.734221
10/1/16	31.709999	27.837975
11/1/16	32.139999	28.215467
12/1/16	31.700001	28.106752
1/1/17	31.73	28.133348
2/1/17	34.119999	30.252439
3/1/17	34.209999	30.641256
4/1/17	33.919998	30.38151
5/1/17	32.650002	29.243994
6/1/17	33.59	30.37715
7/1/17	33.16	29.988276
8/1/17	33.919998	30.675583
9/1/17	35.700001	32.600689
10/1/17	35.060001	32.016254
11/1/17	36.259998	33.112072
12/1/17	36.220001	33.377781
1/1/18	37.040001	34.133434
2/1/18	36.310001	33.460716
3/1/18	35.490002	33.008053
4/1/18	36.610001	34.049728
5/1/18	35.93	33.417286
6/1/18	36.279999	34.072186
7/1/18	39.93	37.50008
8/1/18	41.52	38.99332
9/1/18	44.07	41.740551
10/1/18	43.060001	40.783939
11/1/18	46.23	43.786377
12/1/18	43.650002	41.661781
1/1/19	42.450001	40.516441
2/1/19	43.349998	41.736805
3/1/19	42.470001	40.889553
4/1/19	40.610001	39.09877
5/1/19	41.52	39.974907
6/1/19	43.32	42.077835
7/1/19	38.84	37.726295
8/1/19	35.549999	34.530632
9/1/19	35.93	35.226242
10/1/19	38.369999	37.61845
11/1/19	38.52	37.765514
12/1/19	39.18	38.783821
1/1/20	37.240002	36.863441
2/1/20	38.049999	38.049999