[tex]\text{Hello there!}\\\\\text{We know that each large pizza cost 11.99 dollars}\\\\\text{We also know the sales tax rate is 6\%, we would calculate tax after}\\\text{finding the total price of the pizzas}\\\\\text{We need to buy 4 pizzas, so multiple 11.99 by 4}\\\\11.99\cdot4=\$47.96\\\\\text{We're not done yet, we need to add the sales tax into the price}\\\\\text{Find the total cost with tax by multiplying 47.96 by 1.06}\\\\47.96\cdot1.06=50.8376\\\text{Round to the nearest hundredths}[/tex]
[tex]\$50.84\\\\\boxed{\text{Answer: c). \$50.84}}[/tex]