shall pay to Lessor a lease fee at mutually agreed upon rates ... summary of all hours of use of the Aircraft during the
preceding month.
(
c
)
Lessee
shall have the sole and exclusive obligation and shall bear all costs
associated with securing ... costs and expenses associated with parts and
accessories utilized for such work.
C
.
Lessee
shall be responsible for costs and expenses incurred in
connection with the following:
Landing fees, ramp