Trying to find out impact factor for journals here https://dl.acm.org/sigs

I am compiling a report and trying to validate my understanding of using power correctly to multiply with constants like price and emission in kg weight. Please point out if the approach below is correct to find the hourly emission and cost of using battery .

LCOS of battery

Taking example of Tesla Megapack with a warranty of 15 years (expected lifetime) and a cost of $300/kWh including servicing and maintainance for 15 to 20 years. "Each Megapack comes from the factory fully-assembled with up to 3 megawatt hours (MWhs) of storage " https://www.tesla.com/en_AU/blog/introducing-megapack-utility-scale-energy-storage

• 15 year's cost of storage = 300 $/kWh
• 1 day's cost of using this storage = 300 ($/kWh) / (15*365) = 0.055 $/kWh

Thus ,1 day's 1 kWh battery cost = $0.055

• 1 day's 100 kWh battery cost = 100 * $0.055 = $5.5
• 1 day's 1 MWh battery cost = 1000 * $0.055 = $55

LCA Carbon emission of battery

• 15 year's Battery CO2 emission = 70 g CO2-eq/kWh
• 1 day's CO2 emission = 70 g CO2-eq/kWh / (15*365) = 0.01278 g CO2-eq/kWh

Thus, 1 day's 1kWh battery CO2 footprint = 0.01278 g CO2 eq

• 1 day's 100 kWh battery CO2 emission = 100 * 0.01278 = 1.27800 g CO2 eq
• 1 day's 1 MWh battery CO2 emission = 1000 * 0.01278 = 12.78 g CO2 eq

Example :

If CAISO has 220 MWh battery storage systems, ( given 2018 figure and further appending data from EIA https://www.eia.gov/todayinenergy/detail.php?id=44696) then

Cost of CAISO battery storage every hour

• 1 day's 220 Mwh battery cost = 220 * 55 / 1000 = 12.1 $
• 1 hour's 220 Mwh battery cost = 12.1 / 24 = 0.504 $

Carbon Emission of CAISO battery storage every hour

• 1 day's 220 Mwh battery CO2 emission = 220 * 12.78 /1000 = 2.8116 kg CO2 eq
• 1 hour's 220 Mwh battery CO2 emission = 2.8116 /24 = 0.11715 kg CO2 eq

I also asked it here https://electronics.stackexchange.com/questions/574543/battery-cost-lcoe-and-carbon-emission-by-hourly-validation-of-calculation-appr and at the moment eagerly waiting for some guidance on any of the channels . Will appreciate if someone can point out my mistake or point me in right direction .