total cost=cost of hammers+cost of screwdrivers
cost of hammers=number of hammers times cost per hammer
cost of screwdrivers=number of screwdrivers tiems cost per screwdriver
number of hammers=4
cost per hammer=11.00
number of screwdrivers=7
cost per screwdriver=6.65
subsiute
cost of hammers=4 times 11.00=44.00
cost of screwdrivers=7 tiems 6.65=46.55
total cost=cost of hammers+cost of screwdrivers
total cost=44.00+46.55=$90.55
total cost=$90.55