A comcast worker came here and installed this HD Box and left this yellow work order. We're not too good with english.

It says our current balance is 174.57 but it says our next stmt is 354.43.

Does that mean we pay $354.43 on our next bill? If so, why so much?
The work that was performed was:

DIGHDBXRM 7.00
HD/DVR UPGRD 17.50

Current:

Leased Modem 3.00
DIGDTV/OFEE 6.95
PERF12 W/VID 42.95
MODEM A/O* 0.00

STARTDIGBXRM 0.00
DIG STARTER 62.40
FRC 1.26
Cable Guide 4.20
PREFW/HBO 28.45

We usually pay $150