; Get period based on timeframe and starting month
; Input Parameters
; PERIOD - Starting Month
; TMFRAME - 30 = 1 Month, 90 = 90 Days, 12 = 1 Year
; Output Parameters
; CPER - Current Period
; PPER - Previous Period
; BQCDAR - Array of current months
; BQPDAR - Array of previous months
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