String cpclConfigLabel = "! 0 200 200 406 1\n" + "ON-FEED IGNORE\n" + "BOX 20 20 10 10 8\n" + "T 0 6 137 177 TEST\n" + "PRINT\n";

These lines comes with Zebra test demo code,

! U1 JOURNAL
! U1 SETLP 5 2 46
 AURORA’S FABRIC SHOP
! U1 SETLP 5 0 24
 123 Castle Drive, Kingston, RI 02881
 (401) 555-4CUT
! U1 SETLP 7 0 24
 4:20 PM Thursday, June 04, 2020 Store: 142
 Order Number: #59285691
 Status: ! U1 SETSP 10
INCOMPLETE ! U1 SETSP 0
Item Description Quant. Price Subtotal Tax
1211 45” Buckram 5 yds @ $3.42/yd $17.10 Y
Z121 60” Blue Silk 10 yds@ $15.00/yd $150.00 N
Z829 60” Muslin 20 yds@ $1.00/yd $20.00 Y
 SUBTOTAL: $187.10
 RHODE ISLAND SALES TAX 7.00%: $2.60
TOTAL: $189.70
! U1 SETLP 7 1 48
 PLEASE BRING THIS RECEIPT TO THE CASHIER
 WITH THE REST OF YOUR PURCHASES.
! U1 CENTER
! U1 B 128 1 2 100 0 0 59285691 ST 187.10 T 2.60 ,

How do I get bytes from this print command? How to do print receipt commands using CPCL?